ULDO LINEAR REGULATORS FAMILY OUTPUT CURRENT PRECISE OUTPUT VOLTA

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ULDO LINEAR REGULATORS FAMILY OUTPUT CURRENT PRECISE OUTPUT VOLTA

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L4955
ULDO LINEAR REGULATORS FAMILY
OUTPUT CURRENT PRECISE OUTPUT VOLTAGES FAST TRANSIENT RESPONSE 0.75V TYP. DROP VOLTAGE OPERATING INPUT VOLTAGE FROM 4.5V ADJUSTABLE VERSION: 1.26V INHIBIT 120µA TYP.) POWER GOOD PROGRAMMABLE CURRENT LIMIT HEPTAWATT PACKAGE FIXED VERSION: 3.3V, 5.1V, OUTPUTS VERSAWATT PACKAGE VERY QUIESCENT CURRENT SHORT CIRCUIT PROTECTION (Foldback function) THERMAL SHUTDOWN APPLICATIONS PENTIUMAND POWER PCSUPPLIES POST REGULATOR SMPS COST SOLUTION 3.3V CONVERSION COST BATTERY CHARGER CONSTANT CURRENT REGULATOR SUITABLE APPLICATION WITH STANDBY FEATURE DESCRIPTION L4955 family monolithic ultra very drop linear regulators designed supply TYPICAL APPLICATIONS MULTIPOWER TECHNOLOGY
HEPTAWATT
VERSAWATT (TO-220)
ORDERING NUMBERS L4955 L4955V3.3 L4955V5.1 L4955V12
OUTPUT VOLTAGE 1.26V 3.3V 5.1V
PACKAGE HEPTAWATT VERSAWATT VERSAWATT VERSAWATT
most recent microprocessors. dropout voltage only 0.75V (Typ.) directly dependent output current conditions. Realized BCDII technology, board charge pump properly drive N-channel power Transistor with 150m RDSON. operates from 4.5V minimum supply, with very quiescent current irrespective load; minimum 22µF output capacitor required stability. on-chip trimming techniques improve precision available output voltages ±2%. Ancillary functions like power good, inhibit with
VOUT
L4955
L4955VXXX
VOUT
D97IN589
D97IN590
March 1998
1/15
L4955
power consumption, programmable output voltage current limiting make flexible heptawatt version usable applications where ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Supply Input Voltage pins pins Power Dissipation Tamb 50°C Power Dissipation Tcase 90°C Storage Temperature Value -0.3 +150 Unit
power management, stand-by, features, post regulation adjustable current generators battery chargers important.
PTOT Tst,
CONNECTIONS (Top views)
connected
D96IN367
D96IN369
HEPTAWATT
VERSAWATT
BLOCK DIAGRAM
10µF
1(1) VREF= 1.26V FIXED C.L. CHARGE PUMP
FOLDBACK
REGULATOR
PROGRAM. C.L.
BUFFER
POWER DMOS 150m 7(3) VOUT 22µF
THERMAL SHUTDOWN
VREF HEPTAWATT VERSAWATT 0.9VREF 4(2)
D96IN366
1.26V INHIBIT ACTIVE HIGH
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L4955
FUNCTIONS
Name Function Unregulated input voltage; this must bypassed with capacitor larger than 10µF. resistor connected between this ground sets programmable current limiting value. When programmable current limiting used must connected GND. TTL-CMOS input. logic high level this input disables device. internal pull-down insures full functionally even open. Ground. output connected directly this terminal 1.26V operation; connected output through resistive divider higher voltages. Open drain output, this signal when output voltage lower than 90%, otherwise high. Regulated output voltage. minimum bypass capacitor 22µF required insure stability.
THERMAL DATA (HEPTAWATT VERSAWATT packages)
Symbol j-case j-amb Parameter Thermal Resistance Junction-case Thermal Resistance Junction-ambient Thermal Shutdown Thermal Hysteresis Max. Max. Typ. Typ. Value Unit °C/W °C/W
L4955 ELECTRICAL CHARACTERISTICS 25°C, 12V, unless otherwise specified). Specifications referred from +125°C.
Symbol Parameter Operating Supply Voltage Output Voltage Line regulation Load regulation Dropout Voltage Test Condition 0.1A 4.5V <12V 4.5V 12V; 0.1A 4.5V <22V; 10mA 0.1A 4.5V Current Limiting Short Circuit Current Programmable Current Limiting Quiescent Current Stand Current Inhibit Threshold Inhibit Hysteresis Inhibit Bias Sink Current Power Good Threshold Power Good Hysteresis Power Good Saturation Ripple Rejection
Output voltage connected ADJ.
Min. 1.235 1.222
Typ. 1.26 1.26 0.75
Max. 1.285 1.298 0.75 3.45 1.00 1.42
Unit
Rlim Rlim 0.1A Rising Edge 0.8V Rising Edge
2.55 0.70
0.55 0.85 1.26
120Hz, 2VPP
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L4955
L4955V3.3 ELECTRICAL CHARACTERISTICS 25°C, unless otherwise specified) Specifications referred from +125°C.
Symbol Parameter Operating Input Voltage Output Voltage Line regulation Load regulation Current Limiting Short Circuit Current Quiescent Current Ripple Rejection Test Condition 4.75V 12V; 0.1A 4.75V 12V; 0.1A 4.5V <12V; 10mA 0.1A 0.1A 120Hz, 2VPP Min. Typ. 3.300 3.300 Max. 3.366 3.399 Unit
3.234 3.201
L4955V5.1 ELECTRICAL CHARACTERISTICS 25°C, unless otherwise specified) Specifications referred from +125°C.
Symbol Parameter Operating Input Voltage Output Voltage Drop-out Voltage Test Condition 6.75V 15V; 0.1A 6.75V 15V; 0.1A 6.5V <15V; 10mA 0.1A 0.1A 120Hz, 2VPP Min. VO+VD Typ. 5.100 5.100 0.75 0.55 Max. 5.200 5.250 0.75 Unit
5.000 4.950
Line regulation Load regulation Current Limiting Short Circuit Current Quiescent Current Ripple Rejection
L4955V12 ELECTRICAL CHARACTERISTICS 25°C, 15V, unless otherwise specified) Specifications referred from +125°C.
Symbol VOUT Parameter Operating Input Voltage Output Voltage Drop-out Voltage Test Condition 22V; 0.1A 0.1A 13.5V <22V; 10mA 0.1A 0.1A 120Hz, 2VPP Min. Typ. 12.00 12.00 0.75 0.55 Max. 12.240 13.360 0.75 Unit
11.760 11.640
Line regulation Load regulation Current Limiting Short Circuit Current Quiescent Current Ripple Rejection
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L4955
L4955 Figure L4955 Operating Area
tput urre perating 12.5 issipation urren itation 4.5V
Figure Output Voltage Stability Junction Temperature
Figure Line Regulation Junction Temperature
Figure Load Regulation
Vout VADJ
Figure Dropout Voltage
Figure Maximum Output Current Junction Temperature with internal current limiting
utput Current
(Vin-Vout)
*Pulsed tecnique been used
5/15
L4955
L4955 Figure Short-circuit Current Junction Temperature with Programmable Current Limiting
Figure Quiescent Current Temperature
Figure Quiescent Current Supply voltage
Figure Quiescent Current Supply Voltage with Programmable Current Limiting
[mA] 25°C
Rlim Rlim
Figure Stand-by Current Supply Voltage with LOGIC HIGH
Figure Ripple Rejection Frequency
Cout 22uF
100k
6/15
L4955
L4955 Figure Ripple Rejection Output Current
High
Figure Power Good Function
VADJ VOUT=VADJ (R1+R2)/R2
VADJ hyst 200mV
D96IN364B
Figure Inhibit Function
VINH
Vref 1.26V hyst 200mV
regulator
regulator
regulator
D96IN365A
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L4955
LINE TRANSIENT RESPONSE Figure
Figure
Figure
Test condition: 12V; 3.3V; 200mA; 10µF (electrolytic capacitor); Cout 22µF (electrolytic capacitor); dV/dt V/µs; 25°C
8/15
L4955
LOAD TRANSIENT RESPONSE Figure Figure
Figure
Test condition: VOUT 3.3V; Load Transient from 0.5A
dIout 25°C
Figure Load transient test circuit.
100µF/10V each each VOUT 3.3V
L4955
C1,C2 470µF/25V Panasonic
D97IN546
9/15
L4955
L4955V3.3 Figure operating area.
utput urrent
Figure Output Voltage Stability Junction Temperature.
Vout Iout 3.35
urrent itation
Vout 3.3V 125°C Power Dissipation
dson
25°C ax=40W
3.25
perating Area
c=70°C ax=22W
10.5 13.5 16.5 19.5 22.5
Input Voltage
Figure Quiescent Current Temperature.
Figure Load Regulation
utput Voltage Deviation Vin=5V (Pulsed tecnique been used) Iout
in=5
Figure Line regulation Junction Temperature.
tput Voltag tion
4.5V Iout
Figure Maximum Output Current Junction Temperature with internal current limiting
utput Current (Vin-Vout)
*Pulsed tecnique been used
10/15
L4955
L4955V5.1 Figure operating area.
urren tion ting 70°C issipa tion
Figure Output Voltage Stability Junction Temperature.
Vout Iout
5.15
5.05
4.95
Figure Quiescent Current Temperature.
[mA]
Figure Load Regulation
2.75 2.25 1.75 1.25 0.75 0.25 [°C] Iout 10mA
nique been used)
Figure Line regulation Junction Temperature.
Output Voltage Deviation [mV] [°C] 6.5V Iout 10mA
Figure Maximum Output Current Junction Temperature with internal current limiting
utput Current (Vin-Vout)
*Pulsed tecnique been used
11/15
L4955
L4955V12 Figure operating area.
dson
Figure Output Voltage Stability Junction Temperature.
Vout 12.25
Iout 12.125
11.875
11.75
Figure Load Regulation
Figure Line regulation Junction Temperature.
utput Voltage eviation 13.5V Iout
Output Voltage Deviation [mV]
(Pulsed tecnique been used)
Iout
Figure Quiescent Current Temperature.
Figure Maximum Output Current Junction Temperature with internal current limiting
utput Current (Vin-Vout)
*Pulsed tecnique been used
12/15
L4955
HEPTAWATT PACKAGE MECHANICAL DATA
DIM. 3.65 15.1 5.08 3.85 0.144 10.05 16.97 14.92 21.54 22.62 15.8 0.102 0.594 0.236 0.110 0.200 0.152 2.41 4.91 7.49 2.54 5.08 7.62 0.35 MIN. TYP. MAX. 1.37 1.35 0.55 2.67 5.21 10.4 10.4 0.396 0.668 0.587 0.848 0.891 0.118 0.622 0.260 0.095 0.193 0.295 0.100 0.200 0.300 0.094 0.047 0.014 0.024 MIN. inch TYP. MAX. 0.189 0.054 0.110 0.053 0.022 0.031 0.035 0.105 0.205 0.307 0.409 0.409
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L4955
VERSAWATT PACKAGE MECHANICAL DATA
DIM. MIN. 26.3 15.1 3.65 10.05 16.2 26.7 27.1 15.8 3.85 1.035 0.102 0.594 0.236 0.144 0.35 1.15 4.95 5.08 TYP. MAX. 1.37 1.35 0.55 1.05 5.21 10.4 10.4 0.396 0.638 1.051 1.067 0.118 0.622 0.260 0.152 0.094 0.047 0.014 0.031 0.045 0.195 0.200 MIN. inch TYP. MAX. 0.189 0.054 0.110 0.053 0.022 0.041 0.055 0.205 0.409 0.409
Dia.
TO220MEC
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L4955
Information furnished believed accurate reliable. However, SGS-THOMSON Microelectronics assumes responsibility consequences such information infringement patents other rights third parties which result from use. license granted implication otherwise under patent patent rights SGS-THOMSON Microelectronics. Specification mentioned this publication subject change without notice. This publication supersedes replaces information previously supplied. SGSTHOMSON Microelectronics products authorized critical components life support devices systems without express written approval SGS-THOMSON Microelectronics. 1998 SGS-THOMSON Microelectronics Printed Italy Rights Reserved SGS-THOMSON Microelectronics GROUP COMPANIES Australia Brazil Canada China France Germany Italy Japan Korea Malaysia Malta Morocco Netherlands Singapore Spain Sweden Switzerland Taiwan Thailand United Kingdom U.S.A.
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ULDO LINEAR REGULATORS FAMILY OUTPUT CURRENT PRECISE OUTPUT VOLTA

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