HIGH PERFORMANCE ULDO LINEAR REGULATOR INPUT VOLTAGE RANGE 200m R

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HIGH PERFORMANCE ULDO LINEAR REGULATOR INPUT VOLTAGE RANGE 200m R

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L6932
HIGH PERFORMANCE ULDO LINEAR REGULATOR
INPUT VOLTAGE RANGE 200m Rdson MAX. 200µA QUIESCENT CURRENT LOAD EXCELLENT LOAD LINE REGULATION 1.5V, 1.8V 2.5V FIXED VOLTAGE ADJUSTABLE FROM 1.2V (L6932D1.2) VOLTAGE REGULATION ACCURACY SHORT CIRCUIT PROTECTION THERMAL SHUT DOWN SO-8 (4+4) PACKAGE
SO-8 (4+4) ORDERING NUMBERS: L6932D1.2 (SO-8) L6932D1.2TR (T&R) L6932D1.5 (SO-8) L6932D1.5TR (T&R) L6932D1.8 (SO-8) L6932D1.8TR (T&R) L6932D2.5 (SO-8) L6932D2.5TR (T&R)
APPLICATIONS MOTHERBOARDS
MOBILE HAND-HELD INSTRUMENTS PCMCIA CARDS PROCESSORS CHIPSET SUPPLY
Mosfet, usefull DC-DC conversion between 2.5V 1.5V portable applications reducing power dissipation. L6932 available 1.5V, 1.8V, 2.5V version from 1.2V ensure voltage regulation accuracy current limit fixed 2.5A control current short circuit condition within ±8%. current sensed power order limit power dissipation. device also provided thermal shut down that limits internal temperature 150°C with histeresys 20°C. L6932 provides Enable Power good functions.
DESCRIPTION L6932 Ultra Drop Output linear regulator operates from able support Designed with internal N-channel TYPICAL OPERATING CIRCUIT
VOUT 1.5V-1.8V-2.5V
L6932D
5,6,7,8
PGOOD
VOUT 1.2V
L6932D
5,6,7,8
December 2005
Rev. 1/11
L6932
CONNECTIONS
PGOOD
L6932D1.2
L6932D1.5 L6932D1.8 L6932D2.5
FUNCTION
L6232D L6232D 1.5/1.8/ Description
Enables device connected disables device forced gnd. Supply voltage. This connected drain internal N-mos. Connect this capacitor larger than 10µF. Connecting this voltage divider possible programme output voltage between 1.2V Regulated output voltage. This connected source internal N-mos. Connect this capacitor 10µF. Regulated output voltage. This connected source internal N-mos. Connect this capacitor 10µF.
PGOOD Power good output. open drain detects output voltage. forced output voltage lower than programmed voltage. Ground pin.
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
Pgood
14.5 -0.3 (Vin +0.3)
THERMAL DATA
Symbol Parameter Value Unit
J-amb Tmax
Thermal Resistance Junction Ambient Maximum Junction Temperature Storage Temperature Range
°C/W
Tstg
Measured Demoboard with about dissipating area
2/11
L6932
BLOCK DIAGRAM (Referred Fixed Voltage version)
CHARGE PUMP VREF REFERENCE VREF=1.25V DRIVER
CURRENT LIMIT
ERROR AMPL.
ENABLE
THERMAL SENSOR VREF
D99IN1100
ELECTRICAL CHARACTERISTCS 25°C, unless otherwise specified) Specification referred from -25°C 125°C.
Symbol Parameter Test Condition Min. Typ. Max. Unit
Operating Supply Voltage Output voltage L6932D1.2 Output voltage L6932D1.5 Output voltage L6932D1.8 Output voltage L6932D2.5 L6932D1.2 Line Regulation 0.1A; 3.3V 0.1A; 3.3V 0.1A; 3.3V 0.1A; 3.3V 2.5V ±10%; 10mA 3.3V ±10%; 10mA ±10%; L6932D1.5 Line Regulation 10mA 2.5V ±10%; 10mA 3.3V ±10%; 10mA ±10%; L6932D1.8 Line Regulation 10mA 2.5V ±10%; 10mA 3.3V ±10%; 10mA ±10%; L6932D2.5 Line Regulation L6932D1.2 Load Regulation L6932D1.5 Load Regulation L6932D1.8 Load Regulation L6932D2.5 Load Regulation ±10%; 10mA 10mA 3.3V ±10%; 10mA 3.3V; 0.1A 3.3V; 0.1A 3.3V; 0.1A 3.3V; 0.1A
1.188 1.485 1.782 2.475
1.212 1.515 1.818 2.525
Rdson
Drain Source resistance
3/11
L6932
ELECTRICAL CHARACTERISTCS (continued)
Symbol Parameter Test Condition Min. Typ. Max. Unit
Iocc
Current limiting Quiescent current Shutdown current Ripple Rejection 120Hz, 2Vpp rise Ipgood =1mA
0.65
Input Threshold Pgood threshold Pgood Hysteresis Pgood saturation
Figure Output Voltage Junction Temperature (L6932D1.2)
1.213 1.212
Figure Output Voltage Junction Temperature (L6932D2.5)
2.520
2.515
1.212 1.211 1.211
2.510 2.505
1.210 1.210 1.209 Temp [°C]
2.500
2.495 Temp [°C]
Figure Output Voltage Junction Temperature (L6932D1.8)
1.808
Figure Quiescent Current Junction Temperature
Vin=5V
1.804
1.800
1.796
(uA)
1.792
1.788 Temp [°C]
Temp
4/11
L6932
Figure Shutdown Current Junction TemperatureAPPLICATION INFORMATIONS
Ishdn (uA) Vin=5V
Temp
APPLICATION CIRCUIT figure schematic circuit demoboards shown. Figure Demoboards Schematic Circuit
VOUT
L6932D1.5 L6932D1.8 L6932D2.5
PGOOD
VOUT 1.2V
L6932D1.2
VOUT
(R1+
COMPONENT LIST Fixed version
Reference Part Number Description Manufacturer
C34Y5U1E106Z C34Y5U1E106Z
10uF, 10uF,
TOKIN TOKIN
5/11
L6932
Figure Demoboard Layout (Fixed Version)
Adjustable version
Reference Part Number Description Manufacturer
C34Y5U1E106Z C34Y5U1E106Z
10uF, 10uF, 5.6K, 0.25W 3.3K, 0.25W
TOKIN TOKIN Neohm Neohm
Figure Demoboard Layout (Adjustable Version)
COMPONENTS SELECTION Input Capacitor input capacitor value depends factors such load transient requirements, input source (battery DC/DC converter) distance from input cap. Usually 47µF enough application much lower value sufficient many cases. Output Capacitor output capacitor choice depends basically load transient requirements. Tantalum, Speciality Polimer, POSCAP aluminum capacitors good offer very values.
6/11
L6932
Multilayer ceramic caps have lowest required particular applications. Nevertheless several applications they loop stability issue considered (see loop stability section). Below list some suggested capacitor manufacturers.
Manufacturer Type Value (µF) Rated Voltage
PANASONIC TAYO YUDEN TOKIN SANYO PANASONIC KEMET
CERAMIC CERAMIC CERAMIC CERAMIC POSCAP TANTALUM
Loop Stability stability loop affected zero introduced output capacitor. time constant zero given ZERO
This zero helps increase phase margin loop until time constant higher than some hundreds nsec, depending also output voltage current. using very ceramic capacitors could produce oscillations output, particular when regulating high output voltages (adjustable version). solve this issue sufficient small capacitor (e.g. 10nF) parallel high side resistor external divider, shown figure Figure Compensation Network
VIN=2V VOUT=1.2V
L6932D1.2
Thermal Considerations Since device housed small SO(4+2+2) package thermal issue bottleneck many applications. power dissipated device given PDISS (VIN VOUT) IOUT
7/11
L6932
thermal resistance junction ambient demoboard approximately 62°C/W. This mean that, considering ambient temperature 60°C maximum junction temperature 150°C, maximum power that device handle 1.5W. This means that device able deliver output current only with very dropout. many applications, high output current pulses required. their duration shorter than thermal constant time board, thermal impedance (not thermal resistance) considered. figure thermal impedance versus duration current pulse SO(4+2+2) mounted board shown. Figure Thermal Impedance
Considering pulse duration 1sec, thermal impedance close 20°C/W, allowing much bigger power dissipated. Example: 3.3V Vout 1.8V Iout Pulse Duration 1sec power dissipated device PDISS (VIN VOUT) IOUT Considering thermal impedance 20°C/W, maximum junction temperature will ZTHJA PDISS 120°C Obviously, with pulse durations longer than approximately 10sec thermal impedance very close thermal resistance (60°C/W 70°C/W).
8/11
L6932
Figure SO-8 Mechanical Data Package Dimensions
DIM. MIN. 5.80 0.25 0.40 1.35 0.10 1.10 0.33 0.19 4.80 3.80 1.27 6.20 0.50 1.27 0.228 0.010 0.016 TYP. MAX. 1.75 0.25 1.65 0.51 0.25 5.00 4.00 MIN. 0.053 0.004 0.043 0.013 0.007 0.189 0.15 0.050 0.244 0.020 0.050 TYP. MAX. 0.069 0.010 0.065 0.020 0.010 0.197 0.157 inch
OUTLINE MECHANICAL DATA
(min.), (max.) 0.10 0.004
Note: Dimensions does include mold flash, protrusions gate burrs. Mold flash, potrusions gate burrs shall exceed 0.15mm (.006inch) total (both side).
SO-8
0016023
9/11
L6932
Table Revision History
Date Revision Description Changes
February 2003 December 2005
First Issue Added Ordering Numbers: L6932D1.5 L6932D1.5TR.
10/11
L6932
Information furnished believed accurate reliable. However, STMicroelectronics assumes responsibility consequences such information infringement patents other rights third parties which result from use. license granted implication otherwise under patent patent rights STMicroelectronics. Specifications mentioned this publication subject change without notice. This publication supersedes replaces information previously supplied. STMicroelectronics products authorized critical components life support devices systems without express written approval STMicroelectronics. logo registered trademark STMicroelectronics. other names property their respective owners 2005 STMicroelectronics rights reserved STMicroelectronics group companies Australia Belgium Brazil Canada China Czech Republic Finland France Germany Hong Kong India Israel Italy Japan Malaysia Malta Morocco Singapore Spain Sweden Switzerland United Kingdom United States America www.st.com
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HIGH PERFORMANCE ULDO LINEAR REGULATOR INPUT VOLTAGE RANGE 200m R

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