TPS737xx
www.ti.com
SBVS067O –JANUARY 2006–REVISED JUNE 2012
1A Low-Dropout Regulator
with Reverse Current Protection
1
FEATURES
DESCRIPTION
The TPS737xx family of linear low-dropout (LDO)
voltage regulators uses an NMOS pass element in a
voltage-follower configuration. This topology is
relatively insensitive to output capacitor value and
ESR, allowing a wide variety of load configurations.
Load transient response is excellent, even with a
small 1.0μF ceramic output capacitor. The NMOS
topology also allows very low dropout.
2
•
Stable with 1.0μF or Larger Ceramic Output
Capacitor
•
•
•
Input Voltage Range: 2.2V to 5.5V
Ultra-Low Dropout Voltage: 130mV typ at 1A
Excellent Load Transient Response—Even
With Only 1.0μF Output Capacitor
•
NMOS Topology Delivers Low Reverse
Leakage Current
The TPS737xx family uses an advanced BiCMOS
process to yield high precision while delivering very
low dropout voltages and low ground pin current.
Current consumption, when not enabled, is under
20nA and ideal for portable applications. These
devices are protected by thermal shutdown and
foldback current limit.
•
•
1.0% Initial Accuracy
3% Overall Accuracy Over Line, Load, and
Temperature
•
•
Less Than 20nA typical IQ in Shutdown Mode
Thermal Shutdown and Current Limit for Fault
Protection
DRB PACKAGE
3mm x 3mm SON
(TOP VIEW)
•
Available in Multiple Output Voltage Versions
–
–
Adjustable Output: 1.20V to 5.5V
OUT
N/C
1
2
3
4
8
7
6
5
IN
Custom Outputs Available Using Factory
Package-Level Programming
N/C
N/C
EN
NR/FB
GND
APPLICATIONS
•
Point of Load Regulation for DSPs, FPGAs,
ASICs, and Microprocessors
DCQ PACKAGE
SOT223
•
•
Post-Regulation for Switching Supplies
Portable/Battery-Powered Equipment
(TOP VIEW)
DRV PACKAGE(1)
2mm x 2mm SON
(TOP VIEW)
6
3
TAB IS GND
Optional
OUT
NR/FB
GND
1
2
3
6
5
4
IN
VIN
VOUT
1.0mF
IN
OUT
FB
N/C
EN
1
2
4
5
TPS737xx
EN
GND
IN
ON
GND
EN
OFF
OUT NR/FB
(1) Power dissipation may limit operating
range. Check Thermal Information table.
Typical Application Circuit
space
1
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2
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2006–2012, Texas Instruments Incorporated