SPX29150/51/52/53
1.5A Low Dropout Voltage Regulator
FEATURES
APPLICATIONS
Adjustable Output Down to 1.25V
Powering VGA and Sound Cards
1% Output Accuracy
LCD Monitors
Output Current of 1.5A USB Power Supplies
Low Dropout Voltage of 390mV @ 1.5A
PowerPC Supplies
Extremely Tight Load and Line
SMPS Post Regulators
Regulation
High-efficiency Green Computer
Extremely Fast Transient Response
Systems
Reverse-Battery Protection High-efficiency Linear Power Supplies
Zero Current Shutdown (5 pin version)
Portable Instrumentation
Error Flag Signal Output for Out of
Constant Current Regulators
Regulation State (5 pin version)
Adjustable Power Supplies
Standard TO-220 and TO-263
Battery Chargers
Packages
DESCRIPTION
The SPX29150/51/52/53 are 1.5A, highly accurate voltage regulators with a low dropout
voltage of 390mV (typical) @ 1.5A. These regulators are specifically designed for low volt -
age applications that require a low dropout voltage and a fast transient response. They are
fully fault protected against over-current, reverse battery, and positive and negative voltage
transients. On-chip trimming adjusts the reference voltage to 1% initial accuracy. Other
features in the 5 pin versions include Enable and Error Flag.
The SPX29150/51/52/53 is offered in 3-pin and 5-pin TO-220 & TO-263 packages. For a 3A
version, refer to the SPX29300 data sheet.
TYPICAL APPLICATION CIRCUITS
SPX29152
1 3 1 4 V
SPX29150 OUT
V V
V OUT IN
IN
2
+ +
+ 2 +
5
3 10 F
10 F
R1
6.8 F 6.8 F
ADJ
GND
R2
Figure 1. Fixed Output Linear Regulator Figure 2. Adjustable Output Linear Regulator
REV B 06/05/08 SP29150/51/52/53 1.5A Low Dropout Voltage Regulator Copyright 2008 Exar Corporation
1
FOR SIPEX
APPROVALABSOLUTE MAXIMUM RATINGS
Storage Temperature Range........................-65C to +150C
Operating Junction Temperature Range......-40C to +125C
Input Voltage (Note 7)......................................................16V
ELECTRICAL CHARACTERISTICS
at VIN=VOUT + 1V and IOUT = 10mA, CIN = 6.8F, COUT = 10F, TA = 25C, unless otherwise specified. The Boldface
applies over the junction temperature range. Adjustable versions are set to 5.0V.
SPX29150/51
PARAMETER CONDITIONS Typ Units
Min Max
1.8V Version
IOUT = 10mA 1.8 1.782 1.818
Output Voltage V
10mA IOUT 1.5A, 2.5V VIN 16V 1.8 1.764 1.836
2.5V Version
IOUT = 10mA 2.5 2.475 2.525
Output Voltage V
10mA IIIOUT1.5A, 3.5V1.5A, 3.5VVVVVIN 116V6V 2.5 2.450 2.550
3.3V Version
IOUT = 10mA 3.3 3.267 3.333
Output Voltage V
10mA IIIOUT1.5A, 4.3V1.5A, 4.3VVVVVIN 116V6V 3.3 3.234 3.366
5.0V Version
IOUT = 10mA 5.0 4.950 5.050
Output Voltage V
10mA IIIOUT1.5A, 6.0V1.5A, 6.0VVVVVIN 116V6V 5.0 4.900 5.100
All Voltage Options
SPX29150/51/52/53
Line Regulation IO = 10mA, (VOUT + 1V) VVVIN 116V6V 0.1 0.5 %
VIN = VOUT + 1V, 10mA IOUT IFULL-
Load Regulation 0.2 1 %
LOAD
V 13 100 ppm/C
Output Voltage
T
Temperature Coefficient
IO = 100mA 70 200
Dropout Voltage (Note 1)
IO = 750mA 230 mV
(except 1.8V version)
IO = 1.5A 390 600
IO = 750mA, VIN = VOUT, +1V 12
Ground Current (Note 3) 25 mA
IO = 1.5A 45
IGNDDO Ground Pin Cur- VIN = 0.1V less than specified V OUT
0.9 mA
rent at Dropout IOUT = 10mA
Current Limit VOUT = 0.0V (Note 2) 2.2 1.7 A
Output Noise Voltage CL = 10F 400
(10Hz to 100kHz) VRMS
IL = 100mA CL = 33F 260
Adjustable version only 1.228 1.252 V
Reference Voltage 1.240
1.215 1.265
Reference Voltage Adjustable version only (Note 8) 1.203 1.277
Adjust Pin 80
40 nA
Bias Current 120
Reference Voltage Tem-
perature (Note 4) 13 ppm/C
Coefficient
Adjust Pin Bias
Current Temperature 0.1 nA/C
Coefficient
Flag Output (Error Comparator) SPX29151/53
1.00
Output Leakage Current VOH=16V 0.1 UA
2.00
Device set for 5V, VIN=4.5V, 300
Output Low Voltage 200 mV
IOL=250A 400
Rev B 06/05/08 SP29150/51/52/53 1.5A Low Dropout Voltage Regulator Copyright 2008 Exar Corporation
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