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Designer's Manual
DC-DC Power Management Databook
information presented this DC-DC Power Management Databook Designer's Manual believed accurate reliable. However, International Rectifier assume responsibility infringement patents other rights third parties which result from use. license granted implication other under patent patent rights International Rectifier. patient liability shall incurred circuits devices described herein. International Rectifier does recommend devices life support applications wherein such directly threaten life injury device failure malfunction. Users International Rectifier devices life support applications assume risks such indemnify International Rectifier against damages resulting from such use. data presented this manual supersedes previous specifications. interest product improvement, International Rectifier reserves right change specifications without notice.
PUBLISHED INTERNATIONAL RECTIFIER, KANSAS ST., SEGUNDO, CALIFORNIA 90245 rights reserved. Reproduction editorial pictorial content without express permission writing prohibited. Printed 10/2002
Table Contents
Section General Information Section Linear Regulators Section Dual Dropout Regulators Section Switching Regulator Controllers Section Package Information Section Contact Information
Section
Section General Information
Introduction Part Identification Quality Reliability Program Cross Reference Guide
Section Introduction Power Conversion Process
International Rectifier, we've spent last years dedicated improving conversion electricity from crude form refined form. Power Conversion Process takes crude energy inconvenient format refines exactly what load requires. International Rectifier dedicated this process. picture four-stage process, with additional stage distribution.
crude electricity
utio trib
input
control
switch
output
refined electricity
dist ribu tion
Diodes Rectifiers Thyristors
Control Power Gate Drivers
HEXFETSchottky Power Fast Recovery MOSFETs Diodes IGBTs
Solid State Relays MOSFETs
information provided International Rectifier this publication believed accurate reliable. However, responsibility assumed International Rectifier use, infringements patents other rights third parties resulting from use. license granted implication other under patent patent rights International Rectifier. patent liability shall incurred circuits devices described herein. International Rectifier reserves right change circuitry specifications time without prior notice.
Life Support Applications Policy
International Rectifier does recommend devices life support applications wherein such directly threaten life injury device failure malfunction. Users International Rectifier devices life support applications assume risks such indemnify International Rectifier against damages resulting from such use.
Copyright 2002, International Rectifier Corporation, Segundo, USA. rights reserved. Reproduction without expressed permission writing prohibited.
Section Part Identification
XXXX
Prefix Part Number
Example: 1010
Other Options
Example: tape reel
Package
table below package options
Voltage
Example: refers 2.5V fixed voltage option refers 3.3V fixed voltage option Blank means Variable voltage option
Temperature Range
70°C* -25°C 85°C -40°C 85°C *Note: Some regulators rated 180!C max.
Package Offering
PACKAGE DESCRIPTION TO-252 D-Pak 2-Pin TSSOP 24-Pin MLPM 6-Pin SOT-23 3-Pin SOT-23 5-Pin TO-263 7-Pin Ultra Thin-Pak2, 7-Pin QSOP Narrow Body 24-Pin QSOP Wide Body 36-Pin SOIC Narrow Body 16-Pin TO-220 7-Pin SOIC Wide Body 28-Pin SOT-223 3-Pin PACKAGE DESIG
Section Quality Reliability Program
Qualification: minimum qualification testing required performed products/processes major process changes production line. major change process will include additional construction analysis. samples will collected from five different lots. Table describes these requirements: TABLE Test Description Operating Life Test Autoclave Temperature Cycle Thermal Shock Power Cycle Test Condition 125°C 150°C 121°C, psi, 100% Air, -65°C +150°C Liquid Liquid, -55°C +125°C Power cycle "ON" "OFF" maximum rated current required keep case temperature between 40°C 125°C 85°C, 85%, Biased +130°C, 85%, Biased Test Duration 1000 Hours Hours Hours Cycles Cycles 10,000 cycles Sample Size/ Acceptance
Highly Accelerated Stress Test (HAST)
1000 Hours Hours
On-Going Reliability Program on-going reliability program been implemented ensure continuous shipment quality parts. regular basis, minimum sample parts according their package outline functionality will selected introduced certain testing procedures described Table TABLE Test Description Operating Life Test Autoclave Temperature Cycle Thermal Shock Highly Accelerated Stress Test (HAST) Test Condition 125°C 121°C, psi, 100% Air, -65°C +150°C Liquid Liquid, -55°C +125°C +130°C, 85%, Biased Test Duration Hours Hours Cycles Cycles Hours Sample Size/ Acceptance 45/0
On-Going Production Program part going quality program, minimum sample pieces from every production will burned minimum hours 125°C. data will collected every single rejected unit will evaluated. This analysis will done minimum five production lots. Also, part this program, production parts will tested extreme temperature requirements. yield analysis from every these extreme temperatures will enable optimize probe programming while screening marginal devices these extreme temperatures.
Section Cross Reference Manufacturer
ALPHA SIPEX SEMICONDUCTOR Cross Comments Part
AS1115 AS1115-18 AS1115-25 AS1115-33 AS1117 AS1117-18 AS1117-25 AS1117-33 AS1580 AS1581 AS1582 AS2810 AS2810-18 AS2810-25 AS2810-33 AS2815 AS2830 AS2830-33 AS2840 AS2840-33 AS2850 AS2850-33 AS2870 AS2884 AS2885 AS2885-33 AS2887 AS2887-33 IRU1010 IRU1010-18 IRU1010-25 IRU1010-33 IRU1117 IRU1117-18 IRU1117-25 IRU1117-33 IRU1175 IRU1160 IRU1150 IRU1010 IRU1010-18 IRU1010-25 IRU1010-33 IRU1015 IRU1030 IRU1030-33 IRU1050 IRU1050-33 IRU1050 IRU1050-33 IRU1075 IRU1075 IRU1050 IRU1050-33 IRU1030 IRU1030-33 Better Better Better Better Better Better Better Better Better Better Better Dropout Dropout Dropout Dropout Dropout Dropout Dropout Dropout Dropout Dropout Dropout Voltage Voltage Voltage Voltage Voltage Voltage Voltage Voltage Voltage Voltage Voltage
CHERRY SEMICONDUCTOR Part Cross Comments
CS5201 CS52015 CS5203 CS5203-33 CS5203A CS5203A-33 CS5204 CS5204-33 CS5205 CS5206 CS5207 CS5207A CS5253 CS5257A IRU1010 IRU1015 IRU1030 IRU1030-33 IRU1050 IRU1050-33 IRU1050 IRU1050-33 IRU1050 IRU1075 IRU1075 IRU1075 IRU1150 IRU1175 Better Dropout Voltage
Better Dropout Voltage Better Dropout Voltage Better Dropout Voltage Better Dropout Voltage
Better Dropout Voltage
Better Better Better Better Better Better Better
Dropout Dropout Dropout Dropout Dropout Dropout Dropout
Voltage Voltage Voltage Voltage Voltage Voltage Voltage
FAIRCHILD Part
RC1117 RC1117-33 RC1584 RC1585 RC1585-33 RC1587 RC1587-33
Cross
IRU1117 IRU1117-33 IRU1075 IRU1050 IRU1050-33 IRU1030 IRU1030-33
Comments
Better Better Better Better Better Better Better Dropout Dropout Dropout Dropout Dropout Dropout Dropout Voltage Voltage Voltage Voltage Voltage Voltage Voltage
Better Dropout Voltage Better Dropout Voltage Better Dropout Voltage
LINEAR TECHNOLOGY Part Cross
LT1083 LT1084 LT1084-33 LT1085 LT1085-33 LT1086 LT1086-33 LT1117 LT1117-18 LT1117-25 LT1117-33 LT1580 LT1582 LT1584 LT1585 LT1585-33 LT1587 LT1587-33 IRU1075 IRU1050 IRU1050-33 IRU1030 IRU1030-33 IRU1015 IRU1015-33 IRU1117 IRU1117-18 IRU1117-25 IRU1117-33 IRU1175 IRU1150 IRU1075 IRU1050 IRU1050-33 IRU1030 IRU1030-33
Comments
Better dropout Voltage Better dropout Voltage Better dropout Voltage
ADVANCED MONOLITHIC SYSTEMS (AMS) Part Cross Comments
AMS1083 AMS1084 AMS1084-33 AMS1085 AMS1085-33 AMS1086 AMS1086-33 AMS1117 AMS1117-18 AMS1117-25 AMS1117-33 AMS1503 AMS1505 AMS1508 AMS1585 AMS1585-33 AMS1587 AMS1587-33 IRU1075 IRU1050 IRU1050-33 IRU1030 IRU1030-33 IRU1015 IRU1015-33 IRU1117 IRU1117-18 IRU1117-25 IRU1117-33 IRU1150 IRU1160 IRU1175 IRU1050 IRU1050-33 IRU1030 IRU1030-33 Better Better Better Better Better Better Better Better Better Better Better Better Better Dropout Dropout Dropout Dropout Dropout Dropout Dropout Dropout Dropout Dropout Dropout Dropout Dropout Voltage Voltage Voltage Voltage Voltage Voltage Voltage Voltage Voltage Voltage Voltage Voltage Voltage
Better dropout Voltage Better dropout Voltage
Better Dropout Voltage Better Dropout Voltage
Section Cross Reference Manufacturer
LINFINITY MICRO ELECTRONICS Part Comments Cross
LX8117 LX8117-25 LX8117-33 LX8117A LX8117A-25 LX8117A-33 LX8383 LX8383A LX8384 LX8384A LX8384-33 LX8385 LX8385A LX8385-33 LX8386 LX8386-33 LX8415 LX8415-25 LX8415-33 LX8580 LX8584 LX8585 LX8585-33 LX8586 LX8586A LX8587 LX8587A LX8587-33 LX8610-25 LX8610-33 IRU1117 IRU1117-25 IRU1117-33 IRU1117 IRU1117-25 IRU1117-33 IRU1075 IRU1075 IRU1050 IRU1050 IRU1050-33 IRU1030 IRU1030 IRU1030-33 IRU1015 IRU1015-33 IRU1010 IRU1010-25 IRU1010-33 IRU1175 IRU1075 IRU1050 IRU1050-33 IRU1075 IRU1075 IRU1030 IRU1030 IRU1030-33 IRU1206-25* IRU1206-33* Better Better Better Better Better Better Better Better Better Better Better Better Dropout Dropout Dropout Dropout Dropout Dropout Dropout Dropout Dropout Dropout Dropout Dropout Voltage Voltage Voltage Voltage Voltage Voltage Voltage Voltage Voltage Voltage Voltage Voltage
MICREL Part
MIC39100-1.8 MIC39100-2.5 MIC39100-3.3 MIC39101-1.8 MIC39101-2.5 MIC39101-3.3 MIC39102 MIC5205
Cross
IRU1206-18 IRU1206-25 IRU1206-33 IRU1207-18 IRU1207-25 IRU1207-33 IRU1209 IRU1205
Comments
SEMTECH Part
EZ1083 EZ1084 EZ1084-33 EZ1085 EZ1085-33 EZ1086 EZ1086-33 EZ1117 EZ1117-25 EZ1117-33 EZ1580 EZ1581 EZ1582 EZ1583 EZ1584 EZ1585 EZ1585A EZ1585-33 EZ1587 EZ1587A EZ1587-33 EZ1588 SC1117 SC1117-33 SC1202 SC1202-33 SC431L SC5205
Cross
IRU1075 IRU1050 IRU1050-33 IRU1030 IRU1030-33 IRU1015 IRU1015-33 IRU1117 IRU1117-25 IRU1117-33 IRU1175 IRU1160 IRU1150 IRU1150 IRU1075 IRU1050 IRU1050 IRU1050-33 IRU1030 IRU1030 IRU1030-33 IRU1030 IRU1117 IRU1117-33 IRU1010 IRU1010-33 IRU431L IRU1205
Comments
Better Dropout Voltage
Better Dropout Voltage Better Dropout Voltage Better Dropout Voltage Better Better Better Better Dropout Dropout Dropout Dropout Voltage Voltage Voltage Voltage
Better Better Better Better
Dropout Dropout Dropout Dropout
Voltage Voltage Voltage Voltage
Better Dropout Voltage Better Dropout Voltage Better Dropout Voltage
Better Dropout Voltage Better Dropout Voltage
NATIONAL Part
LM1084 LM1084-33 LM1085 LM1085-33 LM1086 LM1086-33 LM1117 LM1117-33 LMS1585A LMS1587 LMS8117
Cross
IRU1050 IRU1050-33 IRU1030 IRU1030-33 IRU1015 IRU1015-33 IRU1117 IRU1117-33 IRU1050 IRU1030 IRU1010
Comments
Better Better Better Better Better Better Better Better Dropout Dropout Dropout Dropout Dropout Dropout Dropout Dropout Voltage Voltage Voltage Voltage Voltage Voltage Voltage Voltage
Better Better Better Better Better Better Better Better
Dropout Dropout Dropout Dropout Dropout Dropout Dropout Dropout
Voltage Voltage Voltage Voltage Voltage Voltage Voltage Voltage
Better Dropout Voltage Better Dropout Voltage
Part
LD1117D LD1117D-33 LF33CDT
Cross
Comments
IRU1117 Better Dropout Voltage IRU1117-33 Better Dropout Voltage IRU1206-33CD Better Dropout Voltage
TEXAS INSTRUMENTS Part Cross
TLV431A IRU431L
Comments
*Not drop-in, compatible only with SOT-223 packages. Refer datasheet determine suitability replacement specific application.
Section
Section Linear Regulators
Selection Guides IRU431L Voltage Adjustable Precision Shunt Regulator IRU431AL Voltage Adjustable Precision Shunt Regulator IRU1010 Dropout Positive Adjustable Regulator IRU1010-18 Dropout Positive Fixed 1.8V Regulator IRU1010-25 Dropout Positive Fixed 2.5V Regulator IRU1010-33 Dropout Positive Fixed 3.3V Regulator IRU1011-33 1.3A Dropout Positive Fixed Regulator IRU1015 1.5A Dropout Positive Adjustable Regulator IRU1015-33 1.5A Dropout Positive Fixed 3.3V Regulator IRU1030 Dropout Positive Adjustable Regulator IRU1030-33 Dropout Positive Fixed 3.3V Regulator IRU1050 Dropout Positive Adjustable Regulator IRU1050-33 Dropout Positive Fixed 3.3V Regulator IRU1075 7.5A Dropout Positive Adjustable Regulator IRU1117 800mA Dropout Positive Adjustable Regulator IRU1117-18 800mA Dropout Positive Fixed 1.8V Regulator IRU1117-25 800mA Dropout Positive Fixed 2.5V Regulator IRU1117-33 800mA Dropout Positive Fixed 3.3V Regulator IRU1120 Dropout Positive Adjustable Regulator IRU1150 Ultra Dropout Positive Adjustable Regulator IRU1160 Ultra Dropout Positive Adjustable Regulator IRU1175 7.5A Ultra Dropout Positive Adjustable Regulator IRU1176 7.5A Ultra Dropout Positive Adjustable Regulator with Shutdown Input IRU1205 300mA Ultra Dropout Positive Adjustable Regulator IRU1205-18 300mA Ultra Dropout Positive Fixed 1.8V Regulator IRU1205-25 300mA Ultra Dropout Positive Fixed 2.5V Regulator IRU1205-28 300mA Ultra Dropout Positive Fixed 2.8V Regulator IRU1205-30 300mA Ultra Dropout Positive Fixed Regulator IRU1205-33 300mA Ultra Dropout Positive Fixed 3.3V Regulator IRU1205-36 300mA Ultra Dropout Positive Fixed 3.6V Regulator IRU1206-18 Ultra Dropout Positive Fixed 1.8V Regulator IRU1206-25 Ultra Dropout Positive Fixed 2.5V Regulator IRU1206-33 Ultra Dropout Positive Fixed 3.3V Regulator IRU1207-18 Ultra Dropout Positive Fixed 1.8V Regulator with Enable Output Flag Pins IRU1207-25 Ultra Dropout Positive Fixed 2.5V Regulators with Enable Output Flag Pins. IRU1207-33 Ultra Dropout Positive Fixed 3.3V Regulator with Enable Output Flag Pins IRU1208 Ultra Dropout Positive Adjustable Regulator with Output Flag IRU1209 Ultra Dropout Positive Adjustable Regulator with Enable
Section
SINGLE DROPOUT SELECTION GUIDE
FEATURES
Adj/ Dropout 0.65 0.62 1.25 0.60 0.60 0.60 0.60 0.60 0.60 0.60 0.60
Error Flag
PACKAGES
TO-252 2-Pin D-Pak MLPM 6-Pin SOT-23 3-Pin SOT-23 5-Pin SOT-23 6-Pin TO-263 3-Pin TO-263 5-Pin TO-263 7-Pin 2-Pin UThin-Pak 3-Pin UThin-Pak 5-Pin UThin-Pak 7-Pin UThin-Pak 8-Pin SOIC TO-220 3-Pin TO-220 5-Pin TO-220 7-Pin 8-Pin Mini MSOP SOT-223 3-Pin
Part
IRU1175 IRU1176 IRU1075 IRU1160 IRU1050-33 IRU1050 IRU1150 IRU1030-33 IRU1030 IRU1120* IRU1015-33 IRU1015 IRU1011-33* IRU1206-18 IRU1207-18 IRU1206-25 IRU1207-25 IRU1206-33 IRU1207-33 IRU1208 IRU1209
*Note: Stable with ceramic capacitor.
Section
SINGLE DROPOUT SELECTION GUIDE CONTINUED
FEATURES
Adj/ Dropout 0.40 0.40 0.40 0.40 0.40 0.40 0.40
Error Flag
PACKAGES
TO-252 2-Pin D-Pak MLPM 6-Pin SOT-23 3-Pin SOT-23 5-Pin SOT-23 6-Pin TO-263 3-Pin TO-263 5-Pin TO-263 7-Pin 2-Pin UThin-Pak 3-Pin UThin-Pak 5-Pin UThin-Pak 7-Pin UThin-Pak 8-Pin SOIC TO-220 3-Pin TO-220 5-Pin TO-220 7-Pin 8-Pin Mini MSOP SOT-223 3-Pin
Part
IRU1010-18 IRU1010-25 IRU1010-33 IRU1010 IRU1117-18 IRU1117-25 IRU1117-33 IRU1117 IRU1205-18* IRU1205-25* IRU1205-28* IRU1205-30* IRU1205-33* IRU1205-36* IRU1205*
*Note: Stable with ceramic capacitor.
WORLD HEADQUARTERS: Kansas St., Segundo, California 90245, Tel: (310) 252-7105 Fax: (310) 252-7903 Visit www.irf.com sales contact information Data specifications subject change without notice. 02/01
Section
Selection Tree
LINEAR REGULATORS
Voltage Shunt
Dual Output
(See Section
Adjustable
IRU431L IRU431AL
Single Output
Adjustable
IRU1260 6A/1A
Fixed
IRU1261 6A/1A (1.5V/2.5V)
Dropout Voltage 1.3V
Dropout Voltage Less than
Adjustable
IRU1010 IRU1015 IRU1030 IRU1050 IRU1075 IRU1117 IRU1120 1.5A 7.5A 0.8A
Fixed
IRU1010-18 IRU1010-25 IRU1010-33 IRU1011-33 1.3A IRU1015-33 1.5A IRU1030-33 IRU1050-33 IRU1117-18 0.8A IRU1117-25 0.8A IRU1117-33 0.8A
Direct Input Supply (Adjustable)
IRU1150 IRU1160 IRU1175 IRU1176 7.5A 7.5A
Single Input Supply (Adjustable)
IRU1205 300mA IRU1208 IRU1209
Single Input Supply (Fixed)
IRU1205-18 IRU1205-25 IRU1205-28 IRU1205-30 IRU1205-33 IRU1205-36 IRU1206-18 IRU1206-25 IRU1206-33 IRU1207-18 IRU1207-25 IRU1207-33 300mA 300mA 300mA 300mA 300mA 300mA
WORLD HEADQUARTERS: Kansas St., Segundo, California 90245, Tel: (310) 252-7105 Fax: (310) 252-7903 Visit www.irf.com sales contact information Data specifications subject change without notice. 02/01
Data Sheet PD94118
IRU431L IRU431AL
-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATOR DESCRIPTION
IRU431L family three-terminal adjustable shunt regulators that also used precision voltage references. output voltage value between VREF(1.24V) with external resistors shown typical application circuit. Other applications this device include being used merged amplifier reference applications such linear regulator secondary side controller voltage power supply applications. IRU431L only requires 80mA maximum quiescent current before regulating, making ideal voltage reference battery type applications. IRU431L initial accuracy while IRU431AL provides 60.5% initial accuracy.
FEATURES
SOT-23 Packages Voltage Reference Initial Accuracy IRU431L 0.5% IRU431AL) Operating Cathode Current (80mA max) Unconditionally Stable with only Adjustable Output from 1.24V 0.25V Typical Output Impedance Compatible with TLV431
APPLICATIONS
Precision Voltage Reference Linear Regulator Controller Secondary Side Controller voltage power supply applications
TYPICAL APPLICATION
VOUT
IRU431L
VREF
Figure Typical application IRU431L shunt regulator voltage reference.
PACKAGE ORDER INFORMATION
(°C) 5-PIN SOT-23 (L5) IRU431LCL5 IRU431ALCL5 3-PIN SOT-23 (L3) IRU431LCL3 IRU431ALCL3
Rev. 07/10/02
IRU431L IRU431AL
ABSOLUTE MAXIMUM RATINGS
Input Voltage Continuous Cathode Current Range Reference Current Range Storage Temperature Range Operating Junction Temperature Range -15mA +15mA -0.05mA -658C 1508C 1508C
PACKAGE INFORMATION
5-PIN SOT-23 (L5)
VIEW
3-PIN SOT-23 (L3)
VIEW
JA=256°C/W
JA=336°C/W
Cathode
Cathode
Anode
Anode
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over TA=0 708C, =1mF. Typical values refer TA=258C. duty cycle pulse testing used which keeps junction case temperatures equal ambient temperature. PARAMETER TEST CONDITION IK=10mA, KA=VREF, TA=258C IK=10mA, VKA=VREF IK=10mA, KA=VREF, TA=258C IK=10mA, VKA=VREF VKA=VREF, IK=10mA Note IK=10mA, DVKA=VREF IK=10mA, R1=10KV, R2=open IK=10mA, R1=10KV, R2=open Note VKA=VREF VKA=6V, VREF=0V VKA=10V, VREF=0V VKA=15V, VREF=0V VKA=VREF, f<1KHz, IK=0.1 15mA, Note 1.228 1.221 1.234 1.228 1.240 1.240 1.240 1.240 0.15 0.05 0.25 UNITS 1.252 1.259 1.246 1.252 mV/V
Reference Voltage VREF IRU431L Reference Voltage VREF IRU431AL VREF Deviation over full VREF(DEV) temperature range Ratio VREF change DVREF/DVKA cathode voltage change Reference Current IREF Deviation over full IREF(DEV) temperature range Minimum Cathode Current IK(MIN) State Cathode Current Ioff
Dynamic Impedance
ZKA0
0.75
Note deviation parameters, VREF(DEV) IREF(DEV) defined differences between maximum minimum values obtained over rated temperature range. average full range temperature coefficient reference input voltage defined
REF(DEV)
?aVREF
REF(258C)
Where: ?aVREF? unit ppm/8C rated operating free temperature device. aVREF positive negative depending whether minimum VREF maximum VREF respectively occurs lower temperature.
Rev. 07/10/02
IRU431L IRU431AL
Note dynamic impedance when VKA=VREF defined ?ZKA0? DVKA When device operating with external resistors (See Figure total dynamic impedance circuit given ?ZKA? ?ZKA0?
DESCRIPTIONS
5-PIN 3-PIN SYMBOL DESCRIPTION Resistors from Cathode ground form divider that sets output voltage. output shunt regulator. capacitor minimum value must connected from this Anode insure unconditional stability. Ground pin. This must connected lowest potential system other pins must higher potential with respect this pin. These pins connected internally.
Cathode
Anode
BLOCK DIAGRAM
Cathode
1.24V
Anode
Figure Simplified block diagram IRU431L.
Rev. 07/10/02
IRU431L IRU431AL
APPLICATION INFORMATION
Output Voltage Setting IRU431L programmed voltages range 1.24 with addition external resistors according following formula: VREF example given below properly select biasing resistor. Assuming: 4.5V VMAX 3.3V 10mA maximum value biasing resistor calculated using following equations: RB(MAX) VMIN IB(MAX) IL(MAX)
IRU431L keeps constant voltage 1.240V between Ground pin. placing resistor across these pins constant current flows through adding IREF current into resistor producing voltage equal
(1.240)
IB(MAX) IK(MIN) Where: VMIN Minimum supply voltage IL(MAX) Maximum load current IB(MAX) Maximum bias current IK(MIN) Maximum value minimum cathode current spec Current through Assuming before, 1.24 1.03mA
which will added 1.240V output voltage shown above equation. Since input bias current 0.5mA max, adds very small error output voltage most applications ignored. example, typical 3.3V application where R2=1.21KV R1=2KV error IADJ only which about 0.03% nominal point.
VOUT
IRU431L
IB(MAX) 0.08 1.03 1.11mA RB(MAX) 108V 1.11
Select 100V Figure Typical application IRU431L programming output voltage. Biasing Resistor (RB) Selection biasing resistor selected such that does limit input current under minimum input supply maximum load biasing current. maximum power dissipation resistor calculated under maximum supply voltage follows: VKA) (MAX)
Where: VMAX Maximum supply voltage (MAX) Maximum power dissipation
(MAX)
3.3) 73mW
Rev. 07/10/02
IRU431L IRU431AL
Thermal Design IRU431L offered surface mount SOT-23 packages. SOT-23 package maximum power dissipation capability 150mW TA=25°C with derating factor -1.2mW table below summarizes maximum power dissipation capability each package versus ambient temperature. Ambient Temperature (TA)
132mW 120mW 108mW 96mW
SOT-23
Stability IRU431L many different domains stability function cathode current. typical threeterminal shunt regulators, IRU431L many domains stability. actual domain which practical circuit operates related cathode current. general device will unconditionally stable cathode current capacitor, larger, connected between cathode anode. cathode current always higher than under minimum line maximum load conditions, capacitor value reduced 0.01mF system will stable.
150mW
previous example, maximum power dissipation device calculated under load maximum input supply condition. maximum power calculated using following equation: PMAX
Where: PMAX Maximum power dissipation 431L example: PMAX (6100 89mW
shown power dissipation table, both packages handle this power dissipation.
Rev. 07/10/02
IRU431L IRU431AL
TYPICAL APPLICATION
Figure cost 3.3V 2.7V output.
Desig
Description Shunt Regulator Capacitor Resistor Resistor Resistor Heat Sink
Part Manuf IRU431L Elect, 220mF, 6.3V, ECAOJFQ221 Panasonic 6.2KV, 118V, 100V, minimum square copper area load current
WORLD HEADQUARTERS: Kansas St., Segundo, California 90245, Tel: (310) 252-7105 Fax: (310) 252-7903 Visit www.irf.com sales contact information Data specifications subject change without notice. 02/01
Rev. 07/10/02
IRU431L IRU431AL
(L3) SOT-23 Package 3-Pin
SYMBOL
0.890 1.120 0.013 0.100 0.370 0.510 0.085 0.180 2.800 3.040 1.200 1.400 0.890 1.030 1.780 2.050 2.100 2.640 0.55 0.450 0.600
NOTE: MEASUREMENTS MILLIMETERS.
Rev. 07/10/02
IRU431L IRU431AL
(L5) SOT-23 Package 5-Pin
SYMBOL
0.90 1.45 0.00 0.15 0.90 1.30 0.25 0.50 0.09 0.20 2.80 3.00 2.60 3.00 1.50 1.75 0.95 1.90 0.35 0.55
NOTE: MEASUREMENTS MILLIMETERS.
Rev. 07/10/02
IRU431L IRU431AL
PACKAGE SHIPMENT METHOD
DESIG SOT-23 SOT-23 PACKAGE DESCRIPTION COUNT PARTS TUBE -PARTS REEL 3000 3000 Orientation
Feed Direction Figure
Feed Direction Figure
WORLD HEADQUARTERS: Kansas St., Segundo, California 90245, Tel: (310) 252-7105 Fax: (310) 252-7903 Visit www.irf.com sales contact information Data specifications subject change without notice. 02/01
Rev. 07/10/02
Data Sheet PD94119
IRU1010
DROPOUT POSITIVE ADJUSTABLE REGULATOR DESCRIPTION
IRU1010 dropout, three-terminal adjustable regulator with minimum output current capability. This product specifically designed provide well regulated supply voltage applications such high speed termination current 3.3V logic supply. IRU1010 also well suited other applications such sound cards. IRU1010 guaranteed have <1.3V dropout full load current making ideal provide well regulated outputs 2.5V 3.6V with 4.75V input supply.
FEATURES
Guaranteed 1.3V Dropout Full Load Current Fast Transient Response Voltage Reference Initial Accuracy Built-In Thermal Shutdown Available SOT-223, D-Pak, Ultra Thin-Pak 8-Pin SOIC Surface-Mount Packages
APPLICATIONS
Sound Card Applications Voltage High Speed Termination Applications Standard 3.3V Chip Logic Applications
TYPICAL APPLICATION
10uF
IRU1010
VOUT
2.85V
22uF
Figure Typical application IRU1010 2.85V SCSI termination regulator.
PACKAGE ORDER INFORMATION
(°C) 2-PIN PLASTIC TO-252 (D-Pak) IRU1010CD 2-PIN PLASTIC Ultra Thin-Pak(P) IRU1010CP 8-PIN PLASTIC SOIC IRU1010CS 3-PIN PLASTIC SOT-223 IRU1010CY
Rev. 08/20/02
IRU1010
ABSOLUTE MAXIMUM RATINGS
Input Voltage Power Dissipation Storage Temperature Range Operating Junction Temperature Range Internally Limited -65°C 150°C 150°C
PACKAGE INFORMATION
2-PIN PLASTIC TO-252 (D-Pak)
FRONT VIEW
2-PIN ULTRA THIN-PAK(P)
FRONT VIEW
8-PIN PLASTIC SOIC
VIEW
3-PIN PLASTIC SO-223
VIEW
VOUT VOUT VOUT VOUT VOUT
VOUT
VOUT
JA=708C/W 0.5"
JA=708C/W 0.5"
JA=558C/W
JA=908C/W 0.4"
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over CIN=1mF, COUT=10mF, TJ=0 1508C. Typical values refer TJ=258C. PARAMETER Reference Voltage Line Regulation Load Regulation (Note Dropout Voltage (Note Current Limit Minimum Load Current (Note Thermal Regulation Ripple Rejection Adjust Current Adjust Current Change Temperature Stability Long Term Stability Output Noise VREF TEST CONDITION Io=10mA, TJ=258C, IN-Vo)=1.5V Io=10mA, IN-Vo)=1.5V Io=10mA, 1.3V<(V IN-Vo)<7V VIN=3.3V, VADJ=0, 10mA<Io<1A Note Io=1A VIN=3.3V, DVo=100mV VIN=3.3V, ADJ=0V 30ms Pulse, VIN-Vo=3V, Io=1A f=120Hz, Co=25mF Tantalum, Io=0.5A, VIN-Vo=3V Io=10mA, VIN-Vo=1.5V, TJ=258C, Io=10mA, VIN-Vo=1.5V Io=10mA, VIN-Vo=1.5V, TJ=258C VIN=3.3V, VADJ=0V, Io=10mA TJ=1258C, 1000Hrs TJ=258C, 10Hz<f<10KHz 1.238 1.225 1.250 1.250 1.262 1.275 0.02 UNITS
0.01 0.003
IADJ
Note duty cycle pulse testing with Kelvin connections required order maintain accurate data. Note Dropout voltage defined minimum differential voltage between VOUT required maintain regulation VOUT. measured when output voltage drops below nominal value.
Note Minimum load current defined minimum current required output order output voltage maintain regulation. Typically, resistor dividers selected such that automatically maintains this current.
Rev. 08/20/02
IRU1010
DESCRIPTIONS
SYMBOL VOUT DESCRIPTION resistor divider from this VOUT ground sets output voltage. output regulator. minimum 10mF capacitor must connected from this ground insure stability. input regulator. Typically large storage capacitor connected from this ground insure that input voltage does below minimum dropout voltage during load transient response. This must always 1.3V higher than order device regulate properly.
BLOCK DIAGRAM
VOUT
1.25V CURRENT LIMIT
THERMAL SHUTDOWN
Figure Simplified block diagram IRU1010.
APPLICATION INFORMATION
Introduction
IRU1010 adjustable Dropout (LDO) regulator three-terminal device which easily programmed with addition external resistors voltages within range 1.25 5.5V. This regulator, unlike first generation three-terminal regulators such LM117 that required differential between input regulated output, only needs 1.3V differential maintain output regulation. This requirement today's voltage applications that typically need 3.3V supply often generated from supply. Other applications such high speed
Rev. 08/20/02
memory termination need switch load current from zero full load tens nanoseconds their pins, which translates approximately 500ns current step regulator. addition, output voltage tolerances sometimes tight they include transient response part specification. IRU1010 specifically designed meet fast current transient needs well providing accurate initial voltage, reducing overall system cost with need fewer output capacitors.
IRU1010
Output Voltage Setting IRU1010 programmed voltages range 1.25V 5.5V with addition external resistors according following formula: VOUT VREF3 load side, effective resistance between regulator load gained factor R2/R1), effective resistance will RP(eff) =RP3(1+ R2/R1). important note that high current applications, this represent significant percentage overall load regulation must keep path from regulator load short possible minimize this effect.
PARASITIC LINE RESISTANCE
Where: VREF 1.25V Typically IADJ 50mA Typically shown Figure
VOUT
IRU1010
Vout
IRU1010
IADJ 50uA
Figure Schematic showing connection best load regulation. Figure Typical application IRU1010 programming output voltage. IRU1010 keeps constant 1.25V between output adjust pin. placing resistor across these pins constant current flows through adding IADJ current into resistor producing voltage equal (1.25/R1)3R2+IADJ3R2 which will added 1.25V output voltage. This summarized above equation. Since minimum load current requirement IRU1010 10mA, typically selected 121V resistor that automatically satisfies minimum current requirement. Notice that since IADJ typically range 50mA only adds small error output voltage should only considered when very precise output voltage setting required. example, typical 3.3V application where R1=121V R2=200V error IADJ only 0.3% nominal point. Load Regulation Since IRU1010 only three-terminal device, possible provide true remote sensing output voltage load. Figure shows that best load regulation achieved when bottom side connected load side resistor connected directly case VOUT regulator load. fact, connected Stability IRU1010 requires output capacitor part frequency compensation order make regulator stable. Typical designs microprocessor applications standard electrolytic capacitors with typical range 100mV output capacitance 1000mF. Fortunately capacitance increases, decreases resulting fixed time constant. IRU1010 takes advantage this phenomena making overall regulator loop stable. most applications minimum 100mF aluminum electrolytic capacitor such Sanyo MVGX series, Panasonic series well Nichicon series insures both stability good transient response. Thermal Design IRU1010 incorporates internal thermal shutdown that protects device when junction temperature exceeds maximum allowable junction temperature. Although this device operate with junction temperatures range 1508C, recommended that selected heat sink chosen such that during maximum continuous load operation junction temperature kept below this number. next example SCSI terminator application shows steps sellecting proper regulator surface-mount package. (See IRU1015 non-surface-mount packages)
Rev. 08/20/02
IRU1010
Assuming following specifications: 0.5V VOUT 2.85V IOUT(MAX) 0.8A 358C Where: forward voltage drop diode shown Figure steps selecting right package with proper board area heatsinking keep junction temperature below 1358C given Calculate maximum power dissipation using: IOUT VOUT) 2.85) 1.32W Calculate maximum uJA(MAX)
output voltage, need select Assuming 121V,
2.85 3121 154.8V 1.25
Select 154V,
10uF
2.85V
22uF
IRU1010
allowed example:
Figure Final Schematic half GTL+ termination regulator.
75.68C/W 1.32
Select package from datasheet with lower than calculated previous step.
Selecting TO-252 (D-Pak) with least 0.5" square 0.062" board using copper which lower than calculated number.
Layout Consideration output capacitors must located close VOUT terminal device possible. recommended section layer board plane connect output capacitors prevent high frequency oscillation that result excessive trace inductance.
WORLD HEADQUARTERS: Kansas St., Segundo, California 90245, Tel: (310) 252-7105 Fax: (310) 252-7903 Visit www.irf.com sales contact information Data specifications subject change without notice. 02/01
Rev. 08/20/02
IRU1010
TO-252 Package 2-Pin
SYMBOL 6.477 6.731 5.004 5.207 0.686 0.838 7.417 8.179 9.703 10.084 0.635 0.889 2.286 4.521 4.623 &1.52 &1.62 2.184 2.388 0.762 0.864 1.016 1.118 5.969 6.223 1.016 1.118 0.102 0.534 0.686 R0.31 R0.51 0.428 0.588
NOTE: MEASUREMENTS MILLIMETERS.
Rev. 08/20/02
IRU1010
Ultra Thin-Pak2-Pin
SYMBOL
5.91 6.17 5.54 5.79 6.02 6.27 1.70 2.03 0.63 0.79 0.17 0.33 2.16 2.41 4.45 4.70 9.42 9.68 0.76 1.27 0.02 0.13 0.89 1.14 0.25 0.25 0.94 1.19 2.92 3.30 5.08
NOTE: MEASUREMENTS MILLIMETERS.
Rev. 08/20/02
IRU1010
SOIC Package 8-Pin Surface Mount, Narrow Body
DETAIL-A 0.386 0.015
DETAIL-A
8-PIN SYMBOL 4.80 4.98 1.27 0.53 0.36 0.46 3.81 3.99 1.52 1.72 0.10 0.25 0.19 0.25 5.80 6.20 0.41 1.27 1.37 1.57
NOTE: MEASUREMENTS MILLIMETERS.
Rev. 08/20/02
IRU1010
SOT-223 Package 3-Pin
SYMBOL
1.498 0.02 2.895 0.637 0.239 6.299 3.30 2.209 4.496 6.70 0.838 1.092
1.702 0.11 3.15 0.85 0.381 6.706 3.708 2.953 4.699 7.30 1.05 1.30
NOTE: MEASUREMENTS MILLIMETERS.
Rev. 08/20/02
IRU1010
PACKAGE SHIPMENT METHOD
DESIG PACKAGE DESCRIPTION TO-252, (D-Pak) Ultra Thin-Pak SOT-223
COUNT
PARTS TUBE
PARTS REEL 2500 2500 2500 2500
Orientation
SOIC, Narrow Body
Feed Direction Figure
Feed Direction Figure
Feed Direction Figure
Feed Direction Figure
WORLD HEADQUARTERS: Kansas St., Segundo, California 90245, Tel: (310) 252-7105 Fax: (310) 252-7903 Visit www.irf.com sales contact information Data specifications subject change without notice. 02/01
Rev. 08/20/02
Data Sheet PD94135
IRU1010-18
DROPOUT POSITIVE FIXED 1.8V REGULATOR DESCRIPTION
IRU1010-18 dropout three-terminal fixed output regulator with minimum output current capability. This product specifically designed provide well regulated supply voltage applications well generating clock supply applications. IRU1010-18 guaranteed have <1.3V dropout full load current making ideal provide well regulated with 3.8V input supply. IRU1010-18 specifically designed stable with cost aluminum capacitors while maintaining stability with tantalum caps.
FEATURES
Guaranteed 1.3V Dropout Full Load Current Fast Transient Response Voltage Reference Initial Accuracy Built-In Thermal Shutdown Available SOT-223, D-Pak, Ultra Thin-Pak 8-Pin SOIC Surface-Mount Packages
APPLICATIONS
Voltage Supply Applications Core Voltage
TYPICAL APPLICATION
3.3V
10uF
10uF
IRU1010-18
VOUT
1.8V
Figure Typical set-up IRU1010-18 3.3V 1.8V regulator application.
PACKAGE ORDER INFORMATION
(°C) 2-PIN PLASTIC TO-252 (D-Pak) IRU1010-18CD 2-PIN PLASTIC Ultra Thin-Pak(P) IRU1010-18CP 8-PIN PLASTIC SOIC IRU1010-18CS 3-PIN PLASTIC SOT-223 IRU1010-18CY
Rev. 07/26/02
IRU1010-18
ABSOLUTE MAXIMUM RATINGS
Input Voltage Power Dissipation Storage Temperature Range Operating Junction Temperature Range Internally Limited -65°C 150°C 125°C
PACKAGE INFORMATION
2-PIN PLASTIC TO-252 (D-Pak)
FRONT VIEW
2-PIN ULTRA THIN-PAK(P)
FRONT VIEW
8-PIN PLASTIC SOIC
3-PIN PLASTIC SO-223
VIEW
VIEW
VOUT VOUT VOUT VOUT VOUT
VOUT
VOUT
JA=70°C/W 0.5"
JA=70°C/W 0.5"
JA=55°C/W
JA=90°C/W 0.4"
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over =1mF, VIN=5V, COUT=10mF 1258C. Typical values refer TJ=258C. PARAMETER Output Voltage Line Regulation Load Regulation (Note Dropout Voltage (Note Current Limit Thermal Regulation Ripple Rejection Temperature Stability Long Term Stability Output Noise TEST CONDITION Io=10mA, TJ=258C Io=10mA Io=10mA, 4.75V<VIN<7V 10mA<Io<1A Io=1A DVo=100mV 30ms Pulse, Io=1A f=120Hz, Co=25mF Tantalum, Io=0.5A Io=10mA TJ=1258C, 1000Hrs TJ=258C, 10Hz<f<10KHz 1.782 1.764 1.800 1.800 1.818 1.836 UNITS
0.01 0.003
Note duty cycle pulse testing with Kelvin connections required order maintain accurate data. Note Dropout voltage defined minimum differential voltage between VOUT required maintain regulation VOUT. measured when output voltage drops below nominal value.
Rev. 07/26/02
IRU1010-18
DESCRIPTIONS
PIN# SYMBOL DESCRIPTION Ground pin. This must connected ground plane using inductance short connection. output regulator. This also connected package. output capacitor must connected this insure stability regulator. Input regulator. Typically large storage capacitor connected from this ground insure that input voltage does below minimum dropout voltage during load transient response. This must always 1.3V higher than VOUT order device regulate properly.
VOUT
BLOCK DIAGRAM
VOUT
1.25V CURRENT LIMIT
THERMAL SHUTDOWN
Figure Simplified block diagram IRU1010-18.
WORLD HEADQUARTERS: Kansas St., Segundo, California 90245, Tel: (310) 252-7105 Fax: (310) 252-7903 Visit www.irf.com sales contact information Data specifications subject change without notice. 02/01
Rev. 07/26/02
IRU1010-18
TO-252 Package 2-Pin
SYMBOL 6.477 6.731 5.004 5.207 0.686 0.838 7.417 8.179 9.703 10.084 0.635 0.889 2.286 4.521 4.623 &1.52 &1.62 2.184 2.388 0.762 0.864 1.016 1.118 5.969 6.223 1.016 1.118 0.102 0.534 0.686 R0.31 R0.51 0.428 0.588
NOTE: MEASUREMENTS MILLIMETERS.
Rev. 07/26/02
IRU1010-18
Ultra Thin-Pak2-Pin
SYMBOL
5.91 6.17 5.54 5.79 6.02 6.27 1.70 2.03 0.63 0.79 0.17 0.33 2.16 2.41 4.45 4.70 9.42 9.68 0.76 1.27 0.02 0.13 0.89 1.14 0.25 0.25 0.94 1.19 2.92 3.30 5.08
NOTE: MEASUREMENTS MILLIMETERS.
Rev. 07/26/02
IRU1010-18
SOIC Package 8-Pin Surface Mount, Narrow Body
DETAIL-A 0.386 0.015
DETAIL-A
8-PIN SYMBOL 4.80 4.98 1.27 0.53 0.36 0.46 3.81 3.99 1.52 1.72 0.10 0.25 0.19 0.25 5.80 6.20 0.41 1.27 1.37 1.57
NOTE: MEASUREMENTS MILLIMETERS.
Rev. 07/26/02
IRU1010-18
SOT-223 Package 3-Pin
SYMBOL
1.498 0.02 2.895 0.637 0.239 6.299 3.30 2.209 4.496 6.70 0.838 1.092
1.702 0.11 3.15 0.85 0.381 6.706 3.708 2.953 4.699 7.30 1.05 1.30
NOTE: MEASUREMENTS MILLIMETERS.
Rev. 07/26/02
IRU1010-18
PACKAGE SHIPMENT METHOD
DESIG PACKAGE DESCRIPTION TO-252, (D-Pak) Ultra Thin-Pak SOT-223
COUNT
PARTS TUBE
PARTS REEL 2500 2500 2500 2500
Orientation
SOIC, Narrow Body
Feed Direction Figure
Feed Direction Figure
Feed Direction Figure
Feed Direction Figure
WORLD HEADQUARTERS: Kansas St., Segundo, California 90245, Tel: (310) 252-7105 Fax: (310) 252-7903 Visit www.irf.com sales contact information Data specifications subject change without notice. 02/01
Rev. 07/26/02
Data Sheet PD94120
IRU1010-25
DROPOUT POSITIVE FIXED 2.5V REGULATOR DESCRIPTION
IRU1010-25 dropout three-terminal fixed output regulator with minimum output current capability. This product specifically designed provide well regulated supply voltage applications well generating clock supply applications. IRU1010-25 guaranteed have <1.3V dropout full load current making ideal provide well regulated with 3.8V input supply. IRU1010-25 specifically designed stable with cost aluminum capacitors while maintaining stability with tantalum caps.
FEATURES
Guaranteed 1.3V Dropout Full Load Current Fast Transient Response Voltage Reference Initial Accuracy Built-In Thermal Shutdown Available SOT-223, D-Pak, Ultra Thin-Pak 8-Pin SOIC Surface-Mount Packages
APPLICATIONS
Voltage Supply Applications Clock Supply Voltage
TYPICAL APPLICATION
10uF
10uF
IRU1010-25
VOUT
2.5V
Figure Typical application IRU1010-25 2.5V regulator.
PACKAGE ORDER INFORMATION
(°C) 2-PIN PLASTIC TO-252 (D-Pak) IRU1010-25CD 2-PIN PLASTIC Ultra Thin-Pak(P) IRU1010-25CP 8-PIN PLASTIC SOIC IRU1010-25CS 3-PIN PLASTIC SOT-223 IRU1010-25CY
Rev. 07/26/02
IRU1010-25
ABSOLUTE MAXIMUM RATINGS
Input Voltage Power Dissipation Storage Temperature Range Operating Junction Temperature Range Internally Limited -65°C 150°C 150°C
PACKAGE INFORMATION
2-PIN PLASTIC TO-252 (D-Pak)
FRONT VIEW
2-PIN ULTRA THIN-PAK(P)
FRONT VIEW
8-PIN PLASTIC SOIC
VIEW
3-PIN PLASTIC SO-223
VOUT
VIEW
VOUT VOUT VOUT VOUT VOUT
VOUT
VOUT
JA=70°C/W 0.5"
JA=70°C/W 0.5"
JA=55°C/W
JA=90°C/W 0.4"
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over =1mF, VIN=5V, COUT=10mF 1258C. Typical values refer TJ=258C. PARAMETER Output Voltage Line Regulation Load Regulation (Note Dropout Voltage (Note Current Limit Thermal Regulation Ripple Rejection Temperature Stability Long Term Stability Output Noise TEST CONDITION Io=10mA, TJ=258C Io=10mA Io=10mA, 4.75V<VIN<7V 10mA<Io<1A Io=1A DVo=100mV 30ms Pulse, Io=1A f=120Hz, Co=25mF Tantalum, Io=0.5A Io=10mA TJ=1258C, 1000Hrs TJ=258C, 10Hz<f<10KHz 2.475 2.450 2.500 2.500 2.525 2.550 0.02 UNITS
0.01 0.003
Note duty cycle pulse testing with Kelvin connections required order maintain accurate data. Note Dropout voltage defined minimum differential voltage between VOUT required maintain regulation VOUT. measured when output voltage drops below nominal value.
Rev. 07/26/02
IRU1010-25
DESCRIPTIONS
PIN# SYMBOL DESCRIPTION Ground pin. This must connected ground plane using inductance short connection. output regulator. This also connected package. output capacitor must connected this insure stability regulator. Input regulator.
VOUT
BLOCK DIAGRAM
VOUT
1.25V CURRENT LIMIT
THERMAL SHUTDOWN
Figure Simplified block diagram IRU1010-25.
WORLD HEADQUARTERS: Kansas St., Segundo, California 90245, Tel: (310) 252-7105 Fax: (310) 252-7903 Visit www.irf.com sales contact information Data specifications subject change without notice. 02/01
Rev. 07/26/02
IRU1010-25
TO-252 Package 2-Pin
SYMBOL 6.477 6.731 5.004 5.207 0.686 0.838 7.417 8.179 9.703 10.084 0.635 0.889 2.286 4.521 4.623 &1.52 &1.62 2.184 2.388 0.762 0.864 1.016 1.118 5.969 6.223 1.016 1.118 0.102 0.534 0.686 R0.31 R0.51 0.428 0.588
NOTE: MEASUREMENTS MILLIMETERS.
Rev. 07/26/02
IRU1010-25
Ultra Thin-Pak2-Pin
SYMBOL
5.91 6.17 5.54 5.79 6.02 6.27 1.70 2.03 0.63 0.79 0.17 0.33 2.16 2.41 4.45 4.70 9.42 9.68 0.76 1.27 0.02 0.13 0.89 1.14 0.25 0.25 0.94 1.19 2.92 3.30 5.08
NOTE: MEASUREMENTS MILLIMETERS.
Rev. 07/26/02
IRU1010-25
SOIC Package 8-Pin Surface Mount, Narrow Body
DETAIL-A 0.386 0.015
DETAIL-A
8-PIN SYMBOL 4.80 4.98 1.27 0.53 0.36 0.46 3.81 3.99 1.52 1.72 0.10 0.25 0.19 0.25 5.80 6.20 0.41 1.27 1.37 1.57
NOTE: MEASUREMENTS MILLIMETERS.
Rev. 07/26/02
IRU1010-25
SOT-223 Package 3-Pin
SYMBOL
1.498 0.02 2.895 0.637 0.239 6.299 3.30 2.209 4.496 6.70 0.838 1.092
1.702 0.11 3.15 0.85 0.381 6.706 3.708 2.953 4.699 7.30 1.05 1.30
NOTE: MEASUREMENTS MILLIMETERS.
Rev. 07/26/02
IRU1010-25
PACKAGE SHIPMENT METHOD
DESIG PACKAGE DESCRIPTION TO-252, (D-Pak) Ultra Thin-Pak SOT-223
COUNT
PARTS TUBE
PARTS REEL 2500 2500 2500 2500
Orientation
SOIC, Narrow Body
Feed Direction Figure
Feed Direction Figure
Feed Direction Figure
Feed Direction Figure
WORLD HEADQUARTERS: Kansas St., Segundo, California 90245, Tel: (310) 252-7105 Fax: (310) 252-7903 Visit www.irf.com sales contact information Data specifications subject change without notice. 02/01
Rev. 07/26/02
Data Sheet PD94121
IRU1010-33
DROPOUT POSITIVE FIXED 3.3V REGULATOR DESCRIPTION
IRU1010-33 dropout three-terminal fixed output regulator with minimum output current capability. This product specifically designed provide well regulated supply voltage applications such VGA, sound cards. IRU1010-33 guaranteed have <1.3V dropout full load current making ideal provide well regulated with 4.75V input supply. IRU1010-33 specifically designed stable with cost aluminum capacitors while maintaining stability with tantalum caps.
FEATURES
Guaranteed 1.3V Dropout Full Load Current Fast Transient Response Output Voltage Initial Accuracy Built-In Thermal Shutdown Available SOT-223, D-Pak, Ultra Thin-Pak 8-Pin SOIC Surface-Mount Packages
APPLICATIONS
Sound Card Applications Standard 3.3V Chip Logic Applications
TYPICAL APPLICATION
10uF
10uF
IRU1010-33
VOUT
3.3V
Figure Typical application IRU1010-33 3.3V regulator.
PACKAGE ORDER INFORMATION
(°C) 2-PIN PLASTIC TO-252 (D-Pak) IRU1010-33CD 2-PIN PLASTIC Ultra Thin-Pak(P) IRU1010-33CP 8-PIN PLASTIC SOIC IRU1010-33CS 3-PIN PLASTIC SOT-223 IRU1010-33CY
Rev. 07/26/02
IRU1010-33
ABSOLUTE MAXIMUM RATINGS
Input Voltage Power Dissipation Storage Temperature Range Operating Junction Temperature Range Internally Limited -65°C 150°C 150°C
PACKAGE INFORMATION
2-PIN PLASTIC TO-252 (D-Pak)
FRONT VIEW
2-PIN ULTRA THIN-PAK(P)
FRONT VIEW
8-PIN PLASTIC SOIC
3-PIN PLASTIC SOT-223
VOUT
VIEW
VIEW
VOUT VOUT VOUT VOUT VOUT
VOUT
VOUT
JA=70°C/W 0.5"
JA=70°C/W 0.5"
JA=55°C/W
JA=90°C/W 0.4"
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over =1mF, VIN=5V, COUT=10mF, 1258C. Typical values refer TJ=258C. PARAMETER Output Voltage Line Regulation Load Regulation (Note Dropout Voltage (Note Current Limit Thermal Regulation Ripple Rejection Temperature Stability Long Term Stability Output Noise TEST CONDITION Io=10mA, TJ=258C Io=10mA Io=10mA, 4.75V<VIN<7V 10mA<Io<1A Io=1A DVo=100mV 30ms Pulse, Io=1A f=120Hz, Co=25mF Tantalum, Io=0.5A Io=10mA TJ=1258C, 1000Hrs TJ=258C, 10Hz<f<10KHz 3.267 3.235 3.300 3.300 3.333 3.365 0.02 UNITS
0.01 0.003
Note duty cycle pulse testing with Kelvin connections required order maintain accurate data. Note Dropout voltage defined minimum differential voltage between VOUT required maintain regulation VOUT. measured when output voltage drops below nominal value.
Rev. 07/26/02
IRU1010-33
DESCRIPTIONS
PIN# SYMBOL DESCRIPTION Ground pin. This must connected ground plane using inductance short connection. output regulator. This also connected package. output capacitor must connected this insure stability regulator. Input regulator.
VOUT
BLOCK DIAGRAM
VOUT
1.25V CURRENT LIMIT
THERMAL SHUTDOWN
Figure Simplified block diagram IRU1010-33.
WORLD HEADQUARTERS: Kansas St., Segundo, California 90245, Tel: (310) 252-7105 Fax: (310) 252-7903 Visit www.irf.com sales contact information Data specifications subject change without notice. 02/01
Rev. 07/26/02
IRU1010-33
TO-252 Package 2-Pin
SYMBOL 6.477 6.731 5.004 5.207 0.686 0.838 7.417 8.179 9.703 10.084 0.635 0.889 2.286 4.521 4.623 &1.52 &1.62 2.184 2.388 0.762 0.864 1.016 1.118 5.969 6.223 1.016 1.118 0.102 0.534 0.686 R0.31 R0.51 0.428 0.588
NOTE: MEASUREMENTS MILLIMETERS.
Rev. 07/26/02
IRU1010-33
Ultra Thin-Pak2-Pin
SYMBOL
5.91 6.17 5.54 5.79 6.02 6.27 1.70 2.03 0.63 0.79 0.17 0.33 2.16 2.41 4.45 4.70 9.42 9.68 0.76 1.27 0.02 0.13 0.89 1.14 0.25 0.25 0.94 1.19 2.92 3.30 5.08
NOTE: MEASUREMENTS MILLIMETERS.
Rev. 07/26/02
IRU1010-33
SOIC Package 8-Pin Surface Mount, Narrow Body
DETAIL-A 0.386 0.015
DETAIL-A
8-PIN SYMBOL 4.80 4.98 1.27 0.53 0.36 0.46 3.81 3.99 1.52 1.72 0.10 0.25 0.19 0.25 5.80 6.20 0.41 1.27 1.37 1.57
NOTE: MEASUREMENTS MILLIMETERS.
Rev. 07/26/02
IRU1010-33
SOT-223 Package 3-Pin
SYMBOL
1.498 0.02 2.895 0.637 0.239 6.299 3.30 2.209 4.496 6.70 0.838 1.092
1.702 0.11 3.15 0.85 0.381 6.706 3.708 2.953 4.699 7.30 1.05 1.30
NOTE: MEASUREMENTS MILLIMETERS.
Rev. 07/26/02
IRU1010-33
PACKAGE SHIPMENT METHOD
DESIG PACKAGE DESCRIPTION TO-252, (D-Pak) Ultra Thin-Pak SOT-223
COUNT
PARTS TUBE
PARTS REEL 2500 2500 2500 2500
Orientation
SOIC, Narrow Body
Feed Direction Figure
Feed Direction Figure
Feed Direction Figure
Feed Direction Figure
WORLD HEADQUARTERS: Kansas St., Segundo, California 90245, Tel: (310) 252-7105 Fax: (310) 252-7903 Visit www.irf.com sales contact information Data specifications subject change without notice. 02/01
Rev. 07/26/02
Data Sheet No.PD94544
IRU1011-33
1.3A DROPOUT POSITIVE FIXED REGULATOR
PRELIMINARY DATA SHEET
FEATURES
Stable with Ceramic Capacitor Guaranteed 1.3V Dropout Full Load Current Fast Transient Response Output Current Limiting Built-In Thermal Shutdown
DESCRIPTION
IRU1011-33 fixed linear regulator capable supplying 1.3A continuous current over line temperature range. IRU1011-33 stable with value ceramic capacitors, allowing designers flexibility external component selection. output protected both current limit thermal shutdown.
APPLICATIONS
High Efficiency Linear Regulator Hard Disk Drivers, CD-ROMs, DVDs ADSL Cable Modems
TYPICAL APPLICATION
VOUT
IRU1011-33
3.3V 4.7uF
4.7uF
Figure Typical application IRU1011-33.
PACKAGE ORDER INFORMATION
(°C) 6-Pin MLPM IRU1011-33CH MLPM Marking CM33
Rev. 09/06/02
IRU1011-33
ABSOLUTE MAXIMUM RATINGS
Input Voltage Operating Junction Temperature Range 150°C Operating Ambient Temperature Range -40°C 125°C Storage Temperature Range -65°C 150°C
PACKAGE INFORMATION
6-PIN MLPM uJA=328C/W Square Exposed underside connected
VOUT
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over VIN=4.5V IOUT=2mA 1.3A, CIN=COUT=4.7mF 08C<TJ<1508C. PARAMETER Output Voltage 3.3V
O(3.3)
Line Regulation RegLINE Load Regulation RegLOAD Dropout Voltage DVOUT= Current Limit Minimum Output Current IO(MIN) Temperature Stability Output Noise Ripple Rejection (VIN Output) Thermal Shutdown TJ(SD) Quiescent Current
IGND
Transient Response Change VOUT with Step Load DIOUT Change Transient Response Change VOUT with Application Transient Response Short Circuit Removal DIOUT Response @IO=Short
TEST CONDITION 4.75V<VIN<5.25V, 5mA[IO[1.3A: TJ=258C 08C[TJ[1508C 4.75V<VIN<5.25V, IO=10mA VIN=4.75V, 10mA[IO[1.3A IO=1.3A VIN=5.5V Note Note TJ=258C, 10Hz<BW<10KHz, Note VIN=5V, Note f=120Hz 4.75V<VIN<5.25V, 0mA[IO[1.3A, Note VIN[7V, 2mA[IO[1.3A VIN=5V, 0mA[IO[50mA, TJ=258C VIN=5V, 10mA<IO<1.3A, tr/1ms VIN=5V, 1.3A 10mA, tf/1ms CIN=CO=10mF, Note step input, tr/1ms, 1mA[IO[1.3A, CIN=CO=10mF, X7R, Note VIN=5V, Short[IO[10mA, CIN=CO=10mF, X7R, Note
3.234 3.2175
UNITS
3.366 3.3825 0.003 <4.2
Rev. 09/06/02
IRU1011-33
Note duty cycle pulse testing with Kelvin connections required order maintain accurate data. Note Dropout voltage defined minimum differential voltage between VOUT required maintain regulation VOUT. measured when output voltage drops below nominal value. Note Minimum load current defined minimum current required output order output voltage maintain regulation. Note Temperature stability change output from nominal over operating temperature range. Note Guaranteed design, tested production.
DESCRIPTIONS
1,2,5 SYMBOL DESCRIPTION connection. power input regulator. minimum input capacitance must connected from this ground insure that input voltage does below minimum dropout voltage during load transient response. This must always higher than VOUT amount dropout voltage (see electrical specification) order device regulate properly. output regulator. minimum output capacitance must connected from this ground insure stability. This connected with ground. also package.
VOUT
BLOCK DIAGRAM
VOUT
CURRENT LIMIT THERMAL SHUTDOWN 1.25V
Figure Simplified block diagram IRU1011-33.
Rev. 09/06/02
IRU1011-33
APPLICATION INFORMATION
Introduction IRU1011-33 regulator 3-terminal device offered fixed output 3.3V designed specifically provide extremely dropout voltage. IRU1011-33 designed meet fast current transient needs well providing accurate initial voltage, reducing overall system cost with need fewer number output capacitors. Thermal Protection When junction temperature exceeds 1508C, internal thermal protection shuts IRU1011-33 down. Current Limit Protection IRU1011-33 provides Over Current Protection when output current exceeds typically output decreases limit power dissipation. Stability IRU1011-33 requires output capacitor part frequency compensation order make regulator stable. minimum input capacitance 4.7mF minimum output capacitance 4.7mF Ceramic capacitor needed regulator stage well specified minimum loads guarantee stability. Transient Response PSRR input output capacitors critical order ensure good transient response PSRR. most important aspects this capacitor selection, placement trace routing. Place each capacitor close physically possible corresponding regulator pin. wide traces inductance path. Couple directly ground power planes possible. capacitors crucial achieving good results. Larger capacitance lower will improve both PSRR transient response. Thermal Design IRU1011-33 incorporates internal thermal shutdown that protects device when junction temperature exceeds allowable maximum junction temperature. Although this device operate with junction temperatures range 1508C, recommended that selected heat sink chosen such that during maximum continuous load operation junction temperature kept below this number. example below shows steps selecting proper surface mount package. Assuming, following conditions: VOUT 3.3V IOUT Avg) Calculate maximum power dissipation using following equation: IOUT VOUT) 3.3) 1.7W MLPM package, have: RTHJA 328C/W 458C PD3RTHJA 1.7332 54.4 TA+DT 99.48C Layout Consideration IRU1011-33, like many other high-speed regulators, requires that output capacitors close device stability. power consideration, ground plane approximately one-inch square component side must dedicated device where pins connected dissipate power. multilayer board used, recommended that inner layers board also dedicated size better thermal characteristics.
WORLD HEADQUARTERS: Kansas St., Segundo, California 90245, Tel: (310) 252-7105 Fax: (310) 252-7903 Visit www.irf.com sales contact information Data specifications subject change without notice. 02/01
Rev. 09/06/02
IRU1011-33
MLPM Package 6-Pin
MARK AREA (SEE NOTE
EXPOSED (OPTIONAL)
NOTE
VIEW
BOTTOM VIEW
Note Details optional, must located within zone indicated. identifier molded, marked metalized features. Note called out, metalized feature will extend exposed pad. Thus does apply.
SIDE VIEW
SYMBOL DESIG
6-PIN
0.80 0.00 0.65 0.15 0.33 1.92 1.11 0.20 0.16 -0.17 0.17 0.90 1.00 0.025 0.05 0.70 0.75 0.20 0.25 0.35 0.43 3.00 2.02 2.12 3.00 1.21 1.31 0.95 0.29 0.45 0.24 0.40 -0.125 -0.30 -0.127
NOTE: MEASUREMENTS MILLIMETERS.
Rev. 09/06/02
IRU1011-33
PACKAGE SHIPMENT METHOD
DESIG PACKAGE DESCRIPTION MLPM COUNT PARTS TUBE -PARTS REEL 3000 Orientation
Feed Direction Figure Live
WORLD HEADQUARTERS: Kansas St., Segundo, California 90245, Tel: (310) 252-7105 Fax: (310) 252-7903 Visit www.irf.com sales contact information Data specifications subject change without notice. 02/01
Rev. 09/06/02
Data Sheet PD94122
IRU1015
1.5A DROPOUT POSITIVE ADJUSTABLE REGULATOR DESCRIPTION
IRU1015 dropout three-terminal adjustable regulator with minimum 1.5A output current capability. This product specifically designed provide well regulated supply voltage applications such 486DX4 processor, P55CI/O supply well high speed termination current 3.3V logic supply. IRU1015 also well suited other applications such sound card. IRU1015 guaranteed have <1.3V dropout full load current making ideal provide well regulated outputs 2.5V 3.3V with 4.75V input supply.
FEATURES
Guaranteed 1.3V Dropout Full Load Current Fast Transient Response Voltage Reference Initial Accuracy Output Current Limiting Built-In Thermal Shutdown
APPLICATIONS
486DX4 Supply Voltage Supply Voltage Sound Card Applications Voltage High Speed Termination Applications Standard 3.3V Chip Logic Applications
TYPICAL APPLICATION
1500uF
IRU1015
VOUT
3.3V 1.5A
1500uF
Figure Typical application IRU1015 3.3V regulator.
Note: P55C trademark Intel Corp.
PACKAGE ORDER INFORMATION
(°C) 2-PIN PLASTIC TO-252 (D-Pak) IRU1015CD 3-PIN PLASTIC TO-263 IRU1015CM 3-PIN PLASTIC TO-220 IRU1015CT
Rev. 08/20/02
IRU1015
ABSOLUTE MAXIMUM RATINGS
Input Voltage Power Dissipation Storage Temperature Range Operating Junction Temperature Range Internally Limited -65°C 150°C 150°C
PACKAGE INFORMATION
2-PIN PLASTIC TO-252 (D-Pak)
FRONT VIEW
3-PIN PLASTIC TO-263
FRONT VIEW
3-PIN PLASTIC TO-220
FRONT VIEW
VOUT
VOUT
VOUT
VOUT
VOUT
JA=70°C/W 0.5" Square
JA=35°C/W Square
JT=2.7°C/W JA=60°C/W
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over CIN=1mF, COUT=10mF, TJ=0 1508C. Typical values refer TJ=258C. PARAMETER Reference Voltage Line Regulation Load Regulation (Note Dropout Voltage (Note Current Limit Minimum Load Current (Note Thermal Regulation Ripple Rejection Adjust Current Adjust Current Change Temperature Stability Long Term Stability Output Noise VREF TEST CONDITION Io=10mA, TJ=258C, IN-Vo)=1.5V Io=10mA, IN-Vo)=1.5V Io=10mA, 1.3V<(V IN-Vo)<7V VIN=3.3V, VADJ=0, 10mA<Io<1.5A Note Io=1.5A VIN=3.3V, DVo=100mV VIN=3.3V, ADJ=0V 30ms Pulse, VIN-Vo=3V, Io=1.5A f=120Hz, Co=25mF Tantalum, Io=0.75A, VIN-Vo=3V Io=10mA, VIN-Vo=1.5V, TJ=258C, Io=10mA, VIN-Vo=1.5V Io=10mA, VIN-Vo=1.5V, TJ=258C VIN=3.3V, VADJ=0V, Io=10mA TJ=1258C, 1000Hrs TJ=258C, 10Hz<f<10KHz 1.238 1.225 1.250 1.250 1.262 1.275 0.02 UNITS
0.01 0.003
IADJ
Note duty cycle pulse testing with Kelvin connections required order maintain accurate data. Note Dropout voltage defined minimum differential voltage between VOUT required maintain regulation VOUT. measured when output voltage drops below nominal value.
Note Minimum load current defined minimum current required output order output voltage maintain regulation. Typically resistor dividers selected such that automatically maintains this current.
Rev. 08/20/02
IRU1015
DESCRIPTIONS
SYMBOL VOUT DESCRIPTION resistor divider from this VOUT ground sets output voltage. output regulator. minimum 10mF capacitor must connected from this ground insure stability. input regulator. Typically large storage capacitor connected from this ground insure that input voltage does below minimum drop voltage during load transient response. This must always 1.3V higher than order device regulate properly.
BLOCK DIAGRAM
VOUT
1.25V CURRENT LIMIT
THERMAL SHUTDOWN
Figure Simplified block diagram IRU1015.
APPLICATION INFORMATION
Introduction
IRU1015 adjustable Dropout (LDO) regulator three-terminal device which easily programmed with addition external resistors voltages within range 1.25 V.This regulator unlike first generation three-terminal regulators such LM117 that required differential between input regulated output, only needs 1.3V differential maintain output regulation. This requirement today's microprocessors that need typically 3.3V supply often generated from supply. Another major requirement these microprocessors need switch load current from zero full load tens nanoseconds their pins, which translates approximately 500ns current step regulator. addition, output voltage tolerances sometimes tight they include transient response part specification. IRU1015 specifically designed meet fast current transient needs well provide accurate initial voltage, reducing overall system cost with need fewer output capacitors.
Rev. 08/20/02
IRU1015
Output Voltage Setting IRU1015 programmed voltages range 1.25V 5.5V with addition external resistors according following formula: VOUT VREF3 load side, effective resistance between regulator load gained factor R2/R1),or effective resistance will RP(eff) =RP3(1+ R2/R1). important note that high current applications, this represent significant percentage overall load regulation must keep path from regulator load short possible minimize this effect.
PARASITIC LINE RESISTANCE
Where: VREF 1.25V Typically IADJ 50mA Typically shown Figure
VOUT
IRU1015
IRU1015
IADJ 50uA
Figure Typical application IRU1015 programming output voltage. IRU1015 keeps constant 1.25V between output adjust pin. placing resistor across these pins constant current flows through adding IADJ current into resistor producing voltage equal (1.25/R1)3R2 IADJ3R2 which will added 1.25V output voltage. This summarized above equation. Since minimum load current requirement IRU1015 10mA, typically selected 121V resistor that automatically satisfies minimum current requirement. Notice that since IADJ typically range 50mA only adds small error output voltage should only considered when very precise output voltage setting required. example, typical 3.3V application where R1=121V R2=200V error IADJ only 0.3% nominal point. Load Regulation Since IRU1015 only three-terminal device, possible provide true remote sensing output voltage load. Figure shows that best load regulation achieved when bottom side connected load side resistor connected directly case VOUT regulator load. fact, connected
Figure Schematic showing connection best load regulation. Stability IRU1015 requires output capacitor part frequency compensation order make regulator stable. Typical designs microprocessor applications standard electrolytic capacitors with typical range 100mV output capacitance 1000mF. Fortunately capacitance increases, decreases resulting fixed time constant. IRU1015 takes advantage this phenomena making overall regulator loop stable. most applications minimum 100mF aluminum electrolytic capacitor such Sanyo MVGX series, Panasonic series well Nichicon series insures both stability good transient response. Thermal Design IRU1015 incorporates internal thermal shutdown that protects device when junction temperature exceeds maximum allowable junction temperature. Although this device operate with junction temperatures range 1508C, recommended that selected heat sink chosen such that during maximum continuous load operation junction temperature kept below this number. example below shows steps selecting proper regulator heat sink 486DX4-120 processor.
Rev. 08/20/02
IRU1015
Assuming following specifications: VOUT 3.45V IOUT(MAX) 1.2A 358C steps selecting proper heat sink keep junction temperature below 135°C given Calculate maximum power dissipation using: IOUT3(V VOUT) 1.23(5 3.45) 1.86W Select package from regulator data sheet record junction case Tab) thermal resistance. Selecting TO-220 package gives 2.78C/W Assuming that heat sink black anodized, calculate maximum Heat sink temperature allowed: Assume, ucs=0.05°C/W (heat-sink-to-case thermal resistance black anodized) PD3(uJC uCS) 1.863(2.7 0.05) 1298C With maximum heat sink temperature calculated previous step, heat-sink-to-air thermal resistance (uSA) calculated first calculating temperature rise above ambient follows: 948C Temperature Rise Above Ambient 508C/W 1.86
Thermalloy AAVID 6041PB 574602 Flow (LFM) Required Required
Note: further information regarding above companies their latest product offerings application support contact your local representative numbers listed below: AAVID Thermalloy.PH# (603) 528-3400 Designing Microprocessor Applications mentioned before IRU1015 designed specifically provide power generation voltage processors requiring voltages range 2.5V 3.6V generated stepping down supply. These processors demand fast regulator that supports their large load current changes. worst case current step seen regulator anywhere range with slew rate 500ns which could happen when processor transitions from "Stop Clock" mode "Full Active" mode. load current step processor actually much faster, order 20ns, however, de-coupling capacitors placed cavity processor socket handle this transition until regulator responds load current levels. Because this requirement, selection high frequency output capacitor imperative design these regulator circuits. Figure shows effects fast transient output voltage regulator. shown this figure, output capacitor produces instantaneous drop equal (VESR =ESR3I) effect will equal rate change output current times inductance capacitor =L3I/t). output capacitance effect droop output voltage proportional time takes regulator respond change current (VC=t3I/C where response time regulator.
Next, heat sink with lower than calculated step must selected. this simply look graphs "Heat Sink Temp Rise Above Ambient" "Power Dissipation" select heat sink that results lower temperature rise than calculated previous step. following heat sinks from AAVID Thermalloy meet this criteria.
Rev. 08/20/02
IRU1015
With output capacitance being 1500mF:
1.6mV 1500
Where: regulator response time
1015plt1-1.0
LOAD CURRENT
output voltage, need select
LOAD CURRENT RISE TIME
Assuming R1=121V,
Figure Typical regulator response fast load current step. example regulator design meet specification 486DX4-120MHz given below. Assume specification processor shown Table
Type Processor 486DX4 Nominal 3.45 IMAX Allowed Output Tolerance ±150
-1)3R1 3.45 -1)3121 213V 1.25
Select 215V, Selecting both resistors tolerance results least amount error introduced resistor dividers leaving ±2.5% error budget IRU1015 reference which well within initial accuracy device. Finally, input capacitor selected follows: Assuming that input voltage drop 150mV before main power supply responds, that main power supply response time 50ms, then minimum input capacitance 1.2A load step given 400mF 0.15
Table GTL+ specification Pentium first step select voltage step allowed output output capacitor's ESR: Assuming regulator's initial accuracy plus resistor divider tolerance ±86mV (±2.5% 3.45V nominal), then total step allowed ESL, -64mV. Assuming that drop -10mV, remaining step will -54mV. Therefore output capacitor must 45mV Sanyo MVGX series good choice achieve both price performance goals. 6MV1500GX, 1500mF, 6.3V less than 36mV typical. Selecting single capacitor achieves design goal. next step calculate drop capacitance discharge make sure that this drop voltage less than selected drop previous step.
should less than: VOUT VDROP) Where: VDROP Input voltage drop allowed step Maximum regulator dropout voltage Load current step 3.45 0.15) 0.167V
Select single 1500mF same type output capacitors exceeds requirements. Figure shows completed schematic example.
Rev. 08/20/02
IRU1015
1500uF
3.45V
1500uF
IRU1015
Layout Consideration output capacitors must located close VOUT terminal device possible. recommended section layer board plane connect output capacitors prevent high frequency oscillation that result from excessive trace inductance.
Figure Final schematic regulator design.
WORLD HEADQUARTERS: Kansas St., Segundo, California 90245, Tel: (310) 252-7105 Fax: (310) 252-7903 Visit www.irf.com sales contact information Data specifications subject change without notice. 02/01
Rev. 08/20/02
IRU1015
TO-252 Package 2-Pin
SYMBOL 6.477 6.731 5.004 5.207 0.686 0.838 7.417 8.179 9.703 10.084 0.635 0.889 2.286 4.521 4.623 &1.52 &1.62 2.184 2.388 0.762 0.864 1.016 1.118 5.969 6.223 1.016 1.118 0.102 0.534 0.686 R0.31 R0.51 0.428 0.588
NOTE: MEASUREMENTS MILLIMETERS.
Rev. 08/20/02
IRU1015
TO-263 Package 3-Pin
SYMBOL
10.05 10.312 8.28 8.763 4.31 4.572 0.66 0.91 1.14 1.40 2.54 14.73 15.75 1.40 1.68 0.00 0.254 2.49 2.74 0.33 0.58 2.286 2.794 2.41 2.67 6.50 7.75
NOTE: MEASUREMENTS MILLIMETERS.
Rev. 08/20/02
IRU1015
TO-220 Package 3-Pin
E-PIN
(5x)
SYMBOL 4.06 4.83 7.58 0.63 1.02 1.14 1.52 0.38 0.56 3.71D 3.96D 14.22 15.062 9.78 10.54 2.29 2.79 4.83 5.33 1.14 1.40 1.14 1.40 5.94 6.55 2.29 2.92 13.716 14.22 2.62 2.87 5.588 6.17
NOTE: MEASUREMENTS MILLIMETERS.
Rev. 08/20/02
IRU1015
PACKAGE SHIPMENT METHOD
DESIG TO-263 TO-220 PACKAGE DESCRIPTION TO-252, (D-Pak) COUNT PARTS TUBE PARTS REEL 2500 -T&R Orientation
Feed Direction Figure
Feed Direction FigureB
WORLD HEADQUARTERS: Kansas St., Segundo, California 90245, Tel: (310) 252-7105 Fax: (310) 252-7903 Visit www.irf.com sales contact information Data specifications subject change without notice. 02/01
Rev. 08/20/02
Data Sheet PD94123
IRU1015-33
1.5A DROPOUT POSITIVE FIXED 3.3V REGULATOR DESCRIPTION
IRU1015-33 dropout three terminal fixed 3.3V output regulator with minimum 1.5A output current capability. This product specifically designed provide well regulated supply voltage applications requiring 3.3V output. IRU1015-33 guaranteed have <1.3V dropout full load current making ideal provide well regulated output with supply voltage 4.6V input.
FEATURES
Guaranteed 1.3V Dropout Full Load Current Fast Transient Response Voltage Reference Initial Accuracy Output Current Limiting Built-In Thermal Shutdown
APPLICATIONS
Standard 3.3V Chip Logic Applications
TYPICAL APPLICATION
100uF
IRU1015-33
VOUT
100uF
3.3V 1.5A
Figure Typical application IRU1015-33.
PACKAGE ORDER INFORMATION
(°C) 2-PIN PLASTIC TO-252 (D-Pak) IRU1015-33CD 3-PIN PLASTIC TO-263 IRU1015-33CM 2-PIN PLASTIC Ultra Thin-Pak(P) IRU1015-33CP 3-PIN PLASTIC TO-220 IRU1015-33CT
Rev. 08/01/02
IRU1015-33
ABSOLUTE MAXIMUM RATINGS
Input Voltage Power Dissipation Storage Temperature Range Operating Junction Temperature Range Internally Limited -65°C 150°C 150°C
PACKAGE INFORMATION
2-PIN PLASTIC TO-252 (D-Pak)
FRONT VIEW
3-PIN PLASTIC TO-263
FRONT VIEW
2-PIN PLASTIC ULTRA THIN-PAK(P)
FRONT VIEW
3-PIN PLASTIC TO-220
FRONT VIEW
VOUT
JA=70°C/W 0.5"
JA=35°C/W Square
JA=70°C/W Square
JT=2.7°C/W JA=60°C/W
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over CIN=1µF, COUT=10µF, TJ=0 1508C. Typical values refer TJ=258C. PARAMETER Output Voltage Line Regulation Load Regulation (Note Dropout Voltage (Note Current Limit Minimum Load Current (Note Thermal Regulation Ripple Rejection Adjust Current Change Temperature Stability Long Term Stability Output Noise TEST CONDITION Io=10mA, TJ=258C, VIN=5V Io=10mA, VIN=5V Io=10mA, 4.7V<VIN<7V VIN=5V, VADJ=0, 10mA<Io<1.5A Note Io=1.5A VIN=5V, DVo=100mV VIN=5V 30ms Pulse, VIN-Vo=3V, Io=1.5A f=120Hz, Co=25mF Tantalum, Io=0.75A, VIN-Vo=3V Io=10mA, VIN-Vo=1.5V, TJ=258C VIN=5V, VADJ=0V, Io=10mA TJ=1258C, 1000Hrs TJ=258C, 10Hz<f<10KHz 3.267 3.234 3.300 3.300 3.333 3.366 0.02 UNITS
0.01 0.003
Note duty cycle pulse testing with Kelvin connections required order maintain accurate data. Note Dropout voltage defined minimum differential voltage between VOUT required maintain regulation VOUT. measured when output voltage drops below nominal value.
Note Minimum load current defined minimum current required output order output voltage maintain regulation. Typically resistor dividers selected such that this current automatically maintained.
Rev. 08/01/02
IRU1015-33
DESCRIPTIONS
SYMBOL VOUT DESCRIPTION This must connected ground plane using inductance short connection. output regulator. minimum 10mF capacitor must connected from this ground insure stability. input regulator. Typically large storage capacitor connected from this ground insure that input voltage does below minimum drop voltage during load transient response. This must always 1.3V higher than order device regulate properly.
BLOCK DIAGRAM
VOUT
1.25V CURRENT LIMIT THERMAL SHUTDOWN
Figure Simplified block diagram IRU1015-33.
APPLICATION INFORMATION
Stability IRU1015-33 requires output capacitor part frequency compensation order make regulator stable. Typical designs microprocessor applications standard electrolytic capacitors with typical range 100mV output capacitance 1000mF. Fortunately capacitance increases, decreases resulting fixed time constant. IRU1015-33 takes advantage this phenomena making overall regulator loop stable. most applications minimum 100mF aluminum electrolytic capacitor such Sanyo MVGX series, Panasonic series well Nichicon series insures both stability good transient response.
WORLD HEADQUARTERS: Kansas St., Segundo, California 90245, Tel: (310) 252-7105 Fax: (310) 252-7903 Visit www.irf.com sales contact information Data specifications subject change without notice. 02/01
Rev. 08/01/02
IRU1015-33
TO-252 Package 2-Pin
SYMBOL 6.477 6.731 5.004 5.207 0.686 0.838 7.417 8.179 9.703 10.084 0.635 0.889 2.286 4.521 4.623 &1.52 &1.62 2.184 2.388 0.762 0.864 1.016 1.118 5.969 6.223 1.016 1.118 0.102 0.534 0.686 R0.31 R0.51 0.428 0.588
NOTE: MEASUREMENTS MILLIMETERS.
Rev. 08/01/02
IRU1015-33
TO-263 Package 3-Pin
SYMBOL
10.05 10.312 8.28 8.763 4.31 4.572 0.66 0.91 1.14 1.40 2.54 14.73 15.75 1.40 1.68 0.00 0.254 2.49 2.74 0.33 0.58 2.286 2.794 2.41 2.67 6.50 7.75
NOTE: MEASUREMENTS MILLIMETERS.
Rev. 08/01/02
IRU1015-33
Ultra Thin-Pak2-Pin
SYMBOL
5.91 6.17 5.54 5.79 6.02 6.27 1.70 2.03 0.63 0.79 0.17 0.33 2.16 2.41 4.45 4.70 9.42 9.68 0.76 1.27 0.02 0.13 0.89 1.14 0.25 0.25 0.94 1.19 2.92 3.30 5.08
NOTE: MEASUREMENTS MILLIMETERS.
Rev. 08/01/02
IRU1015-33
TO-220 Package 3-Pin
E-PIN
(5x)
SYMBOL 4.06 4.83 7.58 0.63 1.02 1.14 1.52 0.38 0.56 3.71D 3.96D 14.22 15.062 9.78 10.54 2.29 2.79 4.83 5.33 1.14 1.40 1.14 1.40 5.94 6.55 2.29 2.92 13.716 14.22 2.62 2.87 5.588 6.17
NOTE: MEASUREMENTS MILLIMETERS.
Rev. 08/01/02
IRU1015-33
PACKAGE SHIPMENT METHOD
DESIG TO-263 Ultra Thin-Pak TO-220
PACKAGE DESCRIPTION TO-252, (D-Pak)
COUNT
PARTS TUBE
PARTS REEL 2500 2500
Orientation
Feed Direction Figure
Feed Direction FigureB
Feed Direction FigureC
WORLD HEADQUARTERS: Kansas St., Segundo, California 90245, Tel: (310) 252-7105 Fax: (310) 252-7903 Visit www.irf.com sales contact information Data specifications subject change without notice. 02/01
Rev. 08/01/02
Data Sheet PD94124
IRU1030
DROPOUT POSITIVE ADJUSTABLE REGULATOR DESCRIPTION
IRU1030 dropout three-terminal adjustable regulator with minimum output current capability. This product specifically designed provide well regulated supply voltage applications such PentiumP54C, P55Cas well GTL+ termination Pentium Proand Klamathprocessor applications. IRU1030 also well suited other processors such Cyrix, Power PCapplications. IRU1030 guaranteed have <1.3V dropout full load current making ideal provide well regulated outputs 2.5V 3.3V with 4.75V input supply.
FEATURES
Guaranteed 1.3V Dropout Full Load Current Fast Transient Response Voltage Reference Initial Accuracy Output Current Limiting Built-In Thermal Shutdown
APPLICATIONS
Voltage Processor Applications such P54C, P55C, Cyrix POWER GTL+ Termination PENTIUM PRO, KLAMATHLow Voltage Memory Termination Applications Standard 3.3V Chip Logic Applications
TYPICAL APPLICATION
1500uF
IRU1030
VOUT
3.3V
1500uF
Figure Typical Application IRU1030 3.3V regulator.
Notes: Pentium P54C, P55C, Klamath, Pentium Pro, trademarks Intel Corp.Cyrix trademark Cyrix Corp. Power trademark Corp.
PACKAGE ORDER INFORMATION
(°C) 2-PIN PLASTIC TO-252 (D-Pak) IRU1030CD 3-PIN PLASTIC TO-263 IRU1030CM 3-PIN PLASTIC TO-220 IRU1030CT
Rev. 08/20/02
IRU1030
ABSOLUTE MAXIMUM RATINGS
Input Voltage Power Dissipation Storage Temperature Range Operating Junction Temperature Range Internally Limited -65°C 150°C 150°C
PACKAGE INFORMATION
2-PIN PLASTIC TO-252 (D-Pak)
FRONT VIEW
3-PIN PLASTIC TO-263
FRONT VIEW
3-PIN PLASTIC TO-220
FRONT VIEW
VOUT
VOUT
VOUT
VOUT
VOUT
JA=70°C/W 0.5" Square
JA=35°C/W Square
JT=2.7°C/W JA=60°C/W
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over CIN=1mF, COUT=10mF, TJ=0 1508C. Typical values refer TJ=258C. PARAMETER Reference Voltage Line Regulation Load Regulation (Note Dropout Voltage (Note Current Limit Minimum Load Current (Note Thermal Regulation Ripple Rejection Adjust Current Adjust Current Change Temperature Stability Long Term Stability Output Noise VREF TEST CONDITION Io=10mA, TJ=258C, IN-Vo)=1.5V Io=10mA, IN-Vo)=1.5V Io=10mA, 1.3V<(V IN-Vo)<7V VIN=3.3V, VADJ=0, 10mA<Io<3A Note Io=3A VIN=3.3V, DVo=100mV VIN=3.3V, ADJ=0V 30ms Pulse, VIN-Vo=3V, Io=3A f=120Hz, Co=25mF Tantalum, Io=1.5A, VIN-Vo=3V Io=10mA, VIN-Vo=1.5V, TJ=258C, Io=10mA, VIN-Vo=1.5V Io=10mA, VIN-Vo=1.5V, TJ=258C VIN=3.3V, VADJ=0V, Io=10mA TJ=1258C, 1000Hrs TJ=258C, 10Hz<f<10KHz 1.238 1.225 1.250 1.250 1.262 1.275 0.02 UNITS
0.01 0.003
IADJ
Note duty cycle pulse testing with Kelvin connections required order maintain accurate data. Note Dropout voltage defined minimum differential voltage between VOUT required maintain regulation VOUT. measured when output voltage drops below nominal value.
Note Minimum load current defined minimum current required output order output voltage maintain regulation. Typically resistor dividers selected such that this current automatically maintained.
Rev. 08/20/02
IRU1030
DESCRIPTIONS
SYMBOL VOUT DESCRIPTION resistor divider from VOUT ground sets output voltage. output regulator. minimum 10µF capacitor must connected from this ground insure stability. input regulator. Typically large storage capacitor connected from this ground insure that input voltage does below minimum drop voltage during load transient response. This must always 1.3V higher than order device regulate properly.
BLOCK DIAGRAM
VOUT
1.25V CURRENT LIMIT
THERMAL SHUTDOWN Figure Simplified block diagram IRU1030.
APPLICATION INFORMATION
Introduction IRU1030 adjustable Dropout (LDO) regulator three-terminal device which easily programmed with addition external resistors voltages within range 1.25 5.5V. This regulator unlike first generation three-terminal regulators such LM117 that required differential between input regulated output, only needs 1.3V differential maintain output regulation. This requirement today's microprocessors that need typically 3.3V supply often generated from supply. Another major requirement these microprocessors such Intel P54Cis need switch load current from zero several amps tens nanoRev. 08/20/02
seconds processor pins, which translates approximately 500ns current step regulator. addition, output voltage tolerances also extremely tight they include transient response part specification. example Intel VREspecification calls total ±100mV including initial tolerance, load regulation 4.6A load step. IRU1030 specifically designed meet fast current transient needs well providing accurate initial voltage, reducing overall system cost with need fewer output capacitors.
IRU1030
Output Voltage Setting IRU1030 programmed voltages range 1.25V 5.5V with addition external resistors according following formula: VOUT VREF3 load side, effective resistance between regulator load gained factor (1+R2/ R1), effective resistance will RP(eff) =RP3(1+R2/ R1). important note that high current applications, this represent significant percentage overall load regulation must keep path from regulator load short possible minimize this effect.
PARASITIC LINE RESISTANCE
Where: VREF 1.25V Typically IADJ 50mA Typically shown Figure
VOUT
IRU1030
IRU1030
50uA
Figure Schematic showing connection best load regulation. Figure Typical application IRU1030 programming output voltage. IRU1030 keeps constant 1.25V between output adjust pin. placing resistor across these pins constant current flows through adding IADJ current into resistor producing voltage equal (1.25/R1)3R2 IADJ3R2 which will added 1.25V output voltage. This summarized above equation. Since minimum load current requirement IRU1030 10mA, typically selected 121V resistor that automatically satisfies minimum current requirement. Notice that since IADJ typically range 50mA only adds small error output voltage should only considered when very precise output voltage setting required. example, typical 3.3V application where R1=121V R2=200V error IADJ only 0.3% nominal point. Load Regulation Since IRU1030 only three-terminal device, possible provide true remote sensing output voltage load. Figure shows that best load regulation achieved when bottom side connected load side resistor connected directly case VOUT regulator load. fact, connected Stability IRU1030 requires output capacitor part frequency compensation order make regulator stable. Typical designs microprocessor applications standard electrolytic capacitors with typical range 100mV output capacitance 1000mF. Fortunately capacitance increases, decreases resulting fixed time constant. IRU1030 takes advantage this phenomena making overall regulator loop stable. most applications minimum 100mF aluminum electrolytic capacitor such Sanyo MVGX series, Panasonic series well Nichicon series insures both stability good transient response. Thermal Design IRU1030 incorporates internal thermal shutdown that protects device when junction temperature exceeds maximum allowable junction temperature. Although this device operate with junction temperatures range 1508C, recommended that selected heat sink chosen such that during maximum continuous load operation junction temperature kept below this number. example below shows steps selecting proper regulator heat sink GTL+ terminator using separate regulator each end.
Rev. 08/20/02
IRU1030
Assuming following specifications: 3.3V VOUT 1.5V IOUT(MAX) 2.7A 358C steps selecting proper heat sink keep junction temperature below 135°C given Calculate maximum power dissipation using: IOUT3(V VOUT) 2.73(3.3 1.5) 4.86W Select package from regulator data sheet record junction case tab) thermal resistance. Selecting TO-220 package gives 2.78C/W Assuming that heat sink black anodized, calculate maximum heat sink temperature allowed: Assume, ucs=0.05°C/W (heat-sink-to-case thermal resistance black anodized) PD3(uJC uCS) 4.863(2.7 0.05) 121.78C With maximum heat sink temperature calculated previous step, heat-sink-to-air thermal resistance (uSA) calculated first calculating temperature rise above ambient follows: 121.7 86.78C T=Temperature Rise Above Ambient 86.7 17.88C/W 4.86 Flow (LFM) Thermalloy 6109PB 6110PB 7141 7178 AAVID 575002 507302 576802B 577102 Note: further information regarding above companies their latest product offerings application support contact your local representative numbers listed below: AAVID.PH# (603) 3400 Thermalloy.PH# (214) 243-4321 Designing Microprocessor Applications mentioned before IRU1030 designed specifically provide power generation voltage processors requiring voltages range 2.5V 3.6V generated stepping down supply. These processors demand fast regulator that supports their large load current changes. worst case current step seen regulator anywhere range with slew rate 500ns which could happen when processor transitions from "Stop Clock" mode "Full Active" mode. load current step processor actually much faster, order 20ns, however decoupling capacitors placed cavity processor socket handle this transition until regulator responds load current levels. Because this requirement selection high frequency output capacitors imperative design these regulator circuits. Figure shows effects fast transient output voltage regulator. shown this figure, output capacitor produces instantaneous drop equal (VESR =ESR3I) effect will equal rate change output current times inductance capacitor. =L3I/t). output capacitance effect droop output voltage proportional time takes regulator respond change current, (Vc=t3I/C) where response time regulator.
Next, heat sink with lower than calculated step must selected. this simply look graphs "Heat Sink Temp Rise Above Ambient" "Power Dissipation" select heat sink that results lower temperature rise than calculated previous step. following heat sinks from AAVID Thermalloy meet this criteria.
Rev. 08/20/02
IRU1030
With output capacitance being 1500mF:
3.6mV 1500
Where: regulator response time
1030plt1-1.0
LOAD CURRENT
output voltage, need select
LOAD CURRENT RISE TIME
Assuming 121V, 0.5%: Figure Typical regulator response fast load current step. example regulator design meet Intel Pentium GTL+ specification given below. Assume specification processor shown Table Type VOUT Processor Nominal Pentium 1.50 IMAX Allowed Output Tolerance ±150 -1)3R1 1.25 -1)3121 24.2V
Select 24.3V, 0.5% Selecting both resistors 0.5% tolerance, results least amount error introduced resistor dividers leaving ±1.3% error budget IRU1030 reference which within initial accuracy device. Finally, input capacitor selected follows:
Table GTL+ Specification Pentium first step select voltage step allowed output output capacitor's ESR: Assuming regulator's initial accuracy plus resistor divider tolerance ±30mV (±2% 1.5V nominal), then total step allowed ESL, -120 Assuming that drop -10mV, remaining step will -110mV. Therefore output capacitor must 40mV Assuming that input voltage drop 150mV before main power supply responds, that main power supply response time 50ms, then minimum input capacitance 2.7A load step given 900mF 0.15
should less than: VOUT VDROP)
Sanyo MVGX series good choice achieve both price performance goals. 6MV1500GX, 1500mF, 6.3V less than 36mV typ. Selecting single capacitor achieves design goal. next step calculate drop capacitance discharge make sure that this drop voltage less than selected drop previous step.
Where: VDROP Input voltage drop allowed step Maximum regulator dropout voltage Load current step (3.3 0.15) 0.16V
Selecting single 1500mF same type output capacitors exceeds requirements. However, same input capacitor also support second regulator other termination.
Rev. 08/20/02
IRU1030
Figure shows completed schematic example.
3.3V
1500uF
1.5V
1500uF 0.5% 24.3 0.5% 0.5%
IRU1030
Layout Consideration output capacitors must located close VOUT terminal device possible. recommended section layer board plane connect output capacitors prevent high frequency oscillation that result excessive trace inductance.
VREF
0.5%
Figure Final schematic half GTL+ termination regulator.
WORLD HEADQUARTERS: Kansas St., Segundo, California 90245, Tel: (310) 252-7105 Fax: (310) 252-7903 Visit www.irf.com sales contact information Data specifications subject change without notice. 02/01
Rev. 08/20/02
IRU1030
TO-252 Package 2-Pin
SYMBOL 6.477 6.731 5.004 5.207 0.686 0.838 7.417 8.179 9.703 10.084 0.635 0.889 2.286 4.521 4.623 &1.52 &1.62 2.184 2.388 0.762 0.864 1.016 1.118 5.969 6.223 1.016 1.118 0.102 0.534 0.686 R0.31 R0.51 0.428 0.588
NOTE: MEASUREMENTS MILLIMETERS.
Rev. 08/20/02
IRU1030
TO-263 Package 3-Pin
SYMBOL
10.05 10.312 8.28 8.763 4.31 4.572 0.66 0.91 1.14 1.40 2.54 14.73 15.75 1.40 1.68 0.00 0.254 2.49 2.74 0.33 0.58 2.286 2.794 2.41 2.67 6.50 7.75
NOTE: MEASUREMENTS MILLIMETERS.
Rev. 08/20/02
IRU1030
TO-220 Package 3-Pin
E-PIN
(5x)
SYMBOL 4.06 4.83 7.58 0.63 1.02 1.14 1.52 0.38 0.56 3.71D 3.96D 14.22 15.062 9.78 10.54 2.29 2.79 4.83 5.33 1.14 1.40 1.14 1.40 5.94 6.55 2.29 2.92 13.716 14.22 2.62 2.87 5.588 6.17
NOTE: MEASUREMENTS MILLIMETERS.
Rev. 08/20/02
IRU1030
PACKAGE SHIPMENT METHOD
DESIG TO-263 TO-220 PACKAGE DESCRIPTION TO-252, (D-Pak) COUNT PARTS TUBE PARTS REEL 2500 -T&R Orientation
Feed Direction Figure
Feed Direction FigureB
WORLD HEADQUARTERS: Kansas St., Segundo, California 90245, Tel: (310) 252-7105 Fax: (310) 252-7903 Visit www.irf.com sales contact information Data specifications subject change without notice. 02/01
Rev. 08/20/02
Data Sheet PD94125
IRU1030-33
DROPOUT POSITIVE FIXED 3.3V REGULATOR DESCRIPTION
IRU1030-33 dropout three-terminal fixed 3.3V output regulator with minimum output current capability. This product specifically designed provide well regulated supply voltage applications requiring 3.3V output. IRU1030-33 guaranteed have <1.3V dropout full load current making ideal provide well regulated output with supply voltage 4.6V input.
FEATURES
Guaranteed 1.3V Dropout Full Load Current Fast Transient Response Voltage Reference Initial Accuracy Output Current Limiting Built-In Thermal Shutdown
APPLICATIONS
Standard 3.3V Chip Logic Applications
TYPICAL APPLICATION
330uF
IRU1030-33
330uF
3.3V
Figure Typical application IRU1030-33.
TYPICAL APPLICATION
(°C) 2-PIN PLASTIC TO-252 (D-Pak) IRU1030-33CD 3-PIN PLASTIC TO-263 IRU1030-33CM 2-PIN PLASTIC Ultra Thin-Pak(P) IRU1030-33CP 3-PIN PLASTIC TO-220 IRU1030-33CT
Rev. 08/01/02
IRU1030-33
ABSOLUTE MAXIMUM RATINGS
Input Voltage Power Dissipation Storage Temperature Range Operating Junction Temperature Range Internally Limited -65°C 150°C 150°C
PACKAGE INFORMATION
2-PIN PLASTIC TO-252 (D-Pak)
FRONT VIEW
3-PIN PLASTIC TO-263
FRONT VIEW
2-PIN PLASTIC ULTRA THIN-PAK(P)
FRONT VIEW
3-PIN PLASTIC TO-220
FRONT VIEW
VOUT
VOUT
JA=70°C/W 0.5"
JA=35°C/W Square
JA=70°C/W Square
JT=2.7°C/W JA=60°C/W
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over CIN=1mF, COUT=10mF, TJ=0 1508C. Typical values refer TJ=258C. PARAMETER Output Voltage Line Regulation Load Regulation (Note Dropout Voltage (Note Current Limit Minimum Load Current (Note Thermal Regulation Ripple Rejection Adjust Current Change Temperature Stability Long Term Stability Output Noise TEST CONDITION Io=10mA,TJ=258C,VIN=5V Io=10mA, VIN=5V Io=10mA, 4.7V<VIN<7V VIN=5V, VADJ=0, 10mA<Io<3A Note Io=3A VIN=5V, DVo=100mV VIN=5V 30ms Pulse, VIN-Vo=3V, Io=3A f=120Hz, Co=25mF Tantalum, Io=1.5A, VIN-Vo=3V Io=10mA, VIN-Vo=1.5V, TJ=258C VIN=5V, ADJ=0V,Io=10mA TJ=1258C, 1000Hrs TJ=258C, 10Hz<f<10KHz 3.267 3.234 3.300 3.300 UNITS 3.333 3.366 0.02
0.01 0.003
Note duty cycle pulse testing with Kelvin connections required order maintain accurate data. Note Dropout voltage defined minimum differential voltage between VOUT required maintain regulation VOUT. measured when output voltage drops below nominal value.
Note Minimum load current defined minimum current required output order output voltage maintain regulation. Typically resistor dividers selected such that automatically maintains this current.
Rev. 08/01/02
IRU1030-33
DESCRIPTIONS
SYMBOL DESCRIPTION This must connected ground plane using inductance short connection. VOUT output regulator. minimum 10mF capacitor must connected from this ground insure stability. input regulator. Typically large storage capacitor connected from this ground insure that input voltage does below minimum drop voltage during load transient response. This must always 1.3V higher than order device regulate properly.
BLOCK DIAGRAM
VOUT
1.25V CURRENT LIMIT
THERMAL SHUTDOWN
Figure Simplified block diagram IRU1030-33.
APPLICATION INFORMATION
Stability IRU1030-33 requires output capacitor part frequency compensation order make regulator stable. Typical designs microprocessor applications standard electrolytic capacitors with typical range 100mV output capacitance 1000mF. Fortunately capacitance increases, decreases resulting fixed time constant. IRU1030-33 takes advantage this phenomena making overall regulator loop stable. most applications minimum 100mF aluminum electrolytic capacitor such Sanyo MVGX series, Panasonic series well Nichicon series insures both stability good transient response.
WORLD HEADQUARTERS: Kansas St., Segundo, California 90245, Tel: (310) 252-7105 Fax: (310) 252-7903 Visit www.irf.com sales contact information Data specifications subject change without notice. 02/01
Rev. 08/01/02
IRU1030-33
TO-252 Package 2-Pin
SYMBOL 6.477 6.731 5.004 5.207 0.686 0.838 7.417 8.179 9.703 10.084 0.635 0.889 2.286 4.521 4.623 &1.52 &1.62 2.184 2.388 0.762 0.864 1.016 1.118 5.969 6.223 1.016 1.118 0.102 0.534 0.686 R0.31 R0.51 0.428 0.588
NOTE: MEASUREMENTS MILLIMETERS.
Rev. 08/01/02
IRU1030-33
TO-263 Package 3-Pin
SYMBOL
10.05 10.312 8.28 8.763 4.31 4.572 0.66 0.91 1.14 1.40 2.54 14.73 15.75 1.40 1.68 0.00 0.254 2.49 2.74 0.33 0.58 2.286 2.794 2.41 2.67 6.50 7.75
NOTE: MEASUREMENTS MILLIMETERS.
Rev. 08/01/02
IRU1030-33
Ultra Thin-Pak2-Pin
SYMBOL
5.91 6.17 5.54 5.79 6.02 6.27 1.70 2.03 0.63 0.79 0.17 0.33 2.16 2.41 4.45 4.70 9.42 9.68 0.76 1.27 0.02 0.13 0.89 1.14 0.25 0.25 0.94 1.19 2.92 3.30 5.08
NOTE: MEASUREMENTS MILLIMETERS.
Rev. 08/01/02
IRU1030-33
TO-220 Package 3-Pin
E-PIN
(5x)
SYMBOL 4.06 4.83 7.58 0.63 1.02 1.14 1.52 0.38 0.56 3.71D 3.96D 14.22 15.062 9.78 10.54 2.29 2.79 4.83 5.33 1.14 1.40 1.14 1.40 5.94 6.55 2.29 2.92 13.716 14.22 2.62 2.87 5.588 6.17
NOTE: MEASUREMENTS MILLIMETERS.
Rev. 08/01/02
IRU1030-33
PACKAGE SHIPMENT METHOD
DESIG TO-263 Ultra Thin-Pak TO-220
PACKAGE DESCRIPTION TO-252, (D-Pak)
COUNT
PARTS TUBE
PARTS REEL 2500 2500
Orientation
Feed Direction Figure
Feed Direction FigureB
Feed Direction FigureC
WORLD HEADQUARTERS: Kansas St., Segundo, California 90245, Tel: (310) 252-7105 Fax: (310) 252-7903 Visit www.irf.com sales contact information Data specifications subject change without notice. 02/01
Rev. 08/01/02
Data Sheet PD94126
IRU1050
DROPOUT POSITIVE ADJUSTABLE REGULATOR DESCRIPTION
IRU1050 dropout three-terminal adjustable regulator with minimum output current capability. This product specifically designed provide well regulated supply voltage applications such PentiumP54C,P55Cas well GTL+ termination Pentium Proand Klamathprocessor applications. IRU1050 also well suited other processors such Cyrix, Power PCapplications. IRU1050 guaranteed have <1.3V dropout full load current making ideal provide well regulated outputs 2.5V 3.3V with 4.75V input supply.
FEATURES
Guaranteed 1.3V Dropout Full Load Current Fast Transient Response Voltage Reference Initial Accuracy Output Current Limiting Built-In Thermal Shutdown
APPLICATIONS
Voltage Processor Applications such P54C, P55C, Cyrix POWER GTL+ Termination PENTIUM PRO, KLAMATHLow Voltage Memory Termination Applications Standard 3.3V Chip Logic Applications
TYPICAL APPLICATION
1500uF
IRU1050
VOUT
3.38V
1500uF
Figure Typical Application IRU1050 3.38V regulator designed meet Intel P54C processors.
Notes: Pentium P54C, P55C, Klamath, Pentium Pro,VRE trademarks Intel Corp. Cyrix trademark Cyrix Corp. Power trademark Corp.
PACKAGE ORDER INFORMATION
(°C) 2-PIN PLASTIC TO-252 (D-Pak) IRU1050CD 3-PIN PLASTIC TO-263 IRU1050CM 2-PIN PLASTIC Ultra Thin-Pak(P) IRU1050CP 3-PIN PLASTIC TO-220 IRU1050CT
Rev. 08/20/02
IRU1050
ABSOLUTE MAXIMUM RATINGS
Input Voltage Power Dissipation Storage Temperature Range Operating Junction Temperature Range Internally Limited -65°C 150°C 150°C
PACKAGE INFORMATION
2-Pin Plastic TO-252 (D-Pak)
FRONT VIEW
3-Pin Plastic TO-263
FRONT VIEW
2-Pin Plastic ULTRA THIN-PAK(P)
FRONT VIEW
3-Pin Plastic TO-220
FRONT VIEW VOUT VOUT
JA=70°C/W 0.5"
JA=35°C/W Square
JA=70°C/W Square
JT=2.7°C/W JA=60°C/W
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over CIN=1mF, COUT=10mF, TJ=0 1508C. Typical values refer TJ=258C. PARAMETER Reference Voltage Line Regulation Load Regulation (Note Dropout Voltage (Note Current Limit Minimum Load Current (Note Thermal Regulation Ripple Rejection Adjust Current Adjust Current Change Temperature Stability Long Term Stability Output Noise IADJ VREF TEST CONDITION Io=10mA, TJ=258C, VIN-Vo=1.5V Io=10mA, VIN-Vo=1.5 Io=10mA, 1.3V<(V IN-Vo)<7V VIN=3.3V, VADJ=0V, 10mA<Io<5A Note Io=4A Io=5A VIN=3.3V, DVo=100mV VIN=3.3V, ADJ=0V 30ms Pulse, VIN-Vo=3V, Io=5A f=120Hz, Co=25mF Tantalum, Io=2.5A, VIN-Vo=3V Io=10mA, VIN-Vo=1.5V, TJ=258C, Io=10mA, VIN-Vo=1.5V Io=10mA, VIN-Vo=1.5V, TJ=258C VIN=3.3V, VADJ=0V, Io=10mA TJ=1258C, 1000Hrs TJ=258C, 10Hz<f<10KHz 1.238 1.225 1.25 1.25 1.262 1.275 0.02 UNITS
0.01 0.003
Note duty cycle pulse testing with Kelvin connections required order maintain accurate data. Note Dropout voltage defined minimum differential voltage between VOUT required maintain regulation VOUT. measured when output voltage drops below nominal value.
Note Minimum load current defined minimum current required output order output voltage maintain regulation. Typically resistor dividers selected such that automatically maintains this current.
Rev. 08/20/02
IRU1050
DESCRIPTIONS
SYMBOL VOUT DESCRIPTION resistor divider from this VOUT ground sets output voltage. output regulator. minimum 10mF capacitor must connected from this ground insure stability. input regulator. Typically large storage capacitor connected from this ground insure that input voltage does below minimum drop voltage during load transient response. This must always 1.3V higher than order device regulate properly.
BLOCK DIAGRAM
VOUT
1.25V CURRENT LIMIT
THERMAL SHUTDOWN
Figure Simplified block diagram IRU1050.
APPLICATION INFORMATION
Introduction IRU1050 adjustable Dropout (LDO) regulator three-terminal device which easily programmed with addition external resistors voltages within range 1.25 This regulator unlike first generation three-terminal regulators such LM117 that required differential between input regulated output, only needs 1.3V differential maintain output regulation. This requirement today's microprocessors that need typically 3.3V supply often generated from supply. Another major requirement these microprocessors such Intel P54Cis need switch load current from zero several amps tens
Rev. 08/20/02
nanoseconds processor pins, which translates approximately 500ns current step regulator. addition, output voltage tolerances also extremely tight they include transient response part specification.For example Intel VREspecification calls total ±100mV including initial tolerance, load regulation 4.6A load step. IRU1050 specifically designed meet fast current transient needs well providing accurate initial voltage, reducing overall system cost with need fewer output capacitors.
IRU1050
Output Voltage Setting IRU1050 programmed voltages range 1.25V 5.5V with addition external resistors according following formula: VOUT VREF3 regulator load gained factor (1+R2/ R1), effective resistance will RP(eff) =RP3(1+R2/ R1). important note that high current applications, this represent significant percentage overall load regulation must keep path from regulator load short possible minimize this effect.
PARASITIC LINE RESISTANCE
Where: VREF 1.25V Typically IADJ 50mA Typically shown Figure
VOUT
IRU1050
IRU1050
IADJ 50uA
Figure Typical application IRU1050 programming output voltage. IRU1050 keeps constant 1.25V between output adjust pin. placing resistor across these pins constant current flows through adding IADJ current into resistor producing voltage equal (1.25/R1)3R2 IADJ3R2 which will added 1.25V output voltage. This summarized above equation. Since minimum load current requirement IRU1050 10mA, typically selected 121V resistor that automatically satisfies minimum current requirement. Notice that since IADJ typically range 50mA only adds small error output voltage should only considered when very precise output voltage setting required. example, typical 3.3V application where R1=121V R2=200V error IADJ only 0.3% nominal point. Load Regulation Since IRU1050 only three-terminal device, possible provide true remote sensing output voltage load. Figure shows that best load regulation achieved when bottom side connected load side resistor connected directly case VOUT regulator load. fact, connected load side, effective resistance between
Figure Schematic showing connection best load regulation. Stability IRU1050 requires output capacitor part frequency compensation order make regulator stable. Typical designs microprocessor applications standard electrolytic capacitors with typical range 100mV output capacitance 1000mF. Fortunately capacitance increases, decreases resulting fixed time constant. IRU1050 takes advantage this phenomena making overall regulator loop stable. most applications minimum 100mF aluminum electrolytic capacitor such Sanyo MVGX series, Panasonic series well Nichicon series insures both stability good transient response. Thermal Design IRU1050 incorporates internal thermal shutdown that protects device when junction temperature exceeds maximum allowable junction temperature. Although this device operate with junction temperatures range 1508C, recommended that selected heat sink chosen such that during maximum continuous load operation junction temperature kept below this number. example below shows steps selecting proper regulator heat sink worst case current consumption using Intel 200MHz microprocessor load.
Rev. 08/20/02
IRU1050
Assuming following specifications: VOUT 3.5V IOUT(MAX) 4.6A 358C steps selecting proper heat sink keep junction temperature below 1358C given Calculate maximum power dissipation using: IOUT3(V VOUT) 4.63(5 3.5) 6.9W Select package from regulator data sheet record junction case tab) thermal resistance. Selecting TO-220 package gives 2.78C/W Assuming that heat sink black anodized, calculate maximum heat sink temperature allowed: Assume, ucs=0.05°C/W (heat-sink-to-case thermal resistance black anodized) PD3(uJC uCS) 6.93(27 0.05) 1168C With maximum heat sink temperature calculated previous step, heat-sink-to-air thermal resistance calculated first calculating temperature rise above ambient follows: 818C Temperature Rise Above Ambient 11.78C/W Designing Microprocessor Applications mentioned before, IRU1050 designed specifically provide power generation voltage processors requiring voltages range 2.5V 3.6V generated stepping down supply. These processors demand fast regulator that supports their large load current changes. worst case current step seen regulator anywhere range with slew rate 500ns which could happen when processor transitions from "Stop Clock" mode "Full Active" mode. load current step processor actually much faster, order 20ns, however, decoupling capacitors placed cavity processor socket handle this transition until regulator responds load current levels. Because this requirement selection high frequency output capacitor imperative design these regulator circuits. Figure shows effects fast transient output voltage regulator. shown this figure, output capacitor produces instantaneous drop equal (DVESR =ESR3DI) effect will equal rate change output current times inductance capacitor. =L3DI/Dt). output capacitance effect droop output voltage proportional time takes regulator respond change current, (DVc=Dt3DI/C) where response time regulator. AAVID.PH# (603) 3400 Thermalloy.PH# (214) 243-4321
Thermalloy AAVID 6021PB
Flow (LFM)
6021PB 6073PB 6109PB
7141D
534202B 534202B 507302
575002 576802B
Note: further information regarding above companies their latest product offerings application support contact your local representative numbers listed below:
Next, heat sink with lower than calculated Step must selected. this simply look graphs "Heat Sink Temp Rise Above Ambient" "Power Dissipation" select heat sink that results lower temperature rise than calculated previous step. following heat sinks from AAVID Thermalloy meet this criteria.
Rev. 08/20/02
IRU1050
output capacitance 531500mF 7500mF
1.2mV 7500
Where: regulator response time
1050plt1-1.0
LOAD CURRENT
output voltage, need select
LOAD CURRENT RISE TIME
Assuming R1=121V, 0.1%: Figure Typical regulator response fast load current step. example regulator design meet Intel P54CVRE specification given below. Assume specification processor shown Table
Type Processor Intel-P54C Nominal 3.50 Allowed Output Tolerance ±100 IMAX
-1)3R1 1.25 -1)3121 217.8V
Select R2=218V, 0.1% Selecting both resistors 0.1% tolerance, results least amount error introduced resistor dividers leaving ±1.3% error budget IRU1050 reference which within initial accuracy device. Finally, input capacitor selected follows: Assuming that input voltage drop 150mV before main power supply responds, that main power supply response time 50ms, then minimum input capacitance 4.6A load step given 1530mF 0.15
Table Processor Specification first step select voltage step allowed output output capacitor's ESR: Assuming regulator's initial accuracy plus resistor divider tolerance ±53mV (±1.5% 3.5V nominal), then total step allowed -47mV. Assuming that drop -10mV, remaining step will -37mV. Therefore output capacitor must
should less than: VOUT VDROP)
Sanyo MVGX series good choice achieve both price performance goals. 6MV1500GX, 1500mF, 6.3V less than 36mV typical. Selecting these capacitors parallel 7.2mV which achieves design goal. next step calculate drop capacitance discharge make sure that this drop voltage less than selected drop previous step.
Where: VDROP Input voltage drop allowed step Maximum regulator dropout voltage Load current step 0.15) 0.032V
Selecting Sanyo 1500mF, same type output capacitors, meets requirements.
Rev. 08/20/02
IRU1050
Figure shows completed schematic example.
1500uF
3.50V
1500uF 0.1% 0.1%
IRU1050
Layout Consideration output capacitors must located close VOUT terminal device possible. recommended section layer board plane connect output capacitors prevent high frequency oscillation that result excessive trace inductance.
Figure Final schematic Intel application.
WORLD HEADQUARTERS: Kansas St., Segundo, California 90245, Tel: (310) 252-7105 Fax: (310) 252-7903 Visit www.irf.com sales contact information Data specifications subject change without notice. 02/01
Rev. 08/20/02
IRU1050
TO-252 Package 2-Pin
SYMBOL 6.477 6.731 5.004 5.207 0.686 0.838 7.417 8.179 9.703 10.084 0.635 0.889 2.286 4.521 4.623 &1.52 &1.62 2.184 2.388 0.762 0.864 1.016 1.118 5.969 6.223 1.016 1.118 0.102 0.534 0.686 R0.31 R0.51 0.428 0.588
NOTE: MEASUREMENTS MILLIMETERS.
Rev. 08/20/02
IRU1050
TO-263 Package 3-Pin
SYMBOL
10.05 10.312 8.28 8.763 4.31 4.572 0.66 0.91 1.14 1.40 2.54 14.73 15.75 1.40 1.68 0.00 0.254 2.49 2.74 0.33 0.58 2.286 2.794 2.41 2.67 6.50 7.75
NOTE: MEASUREMENTS MILLIMETERS.
Rev. 08/20/02
IRU1050
Ultra Thin-Pak2-Pin
SYMBOL
5.91 6.17 5.54 5.79 6.02 6.27 1.70 2.03 0.63 0.79 0.17 0.33 2.16 2.41 4.45 4.70 9.42 9.68 0.76 1.27 0.02 0.13 0.89 1.14 0.25 0.25 0.94 1.19 2.92 3.30 5.08
NOTE: MEASUREMENTS MILLIMETERS.
Rev. 08/20/02
IRU1050
TO-220 Package 3-Pin
E-PIN
(5x)
SYMBOL 4.06 4.83 7.58 0.63 1.02 1.14 1.52 0.38 0.56 3.71D 3.
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