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SBVS037I – AUGUST 2003 – REVISED MAY 2006
Cap-Free, NMOS, 250mA Low Dropout Regulator
with Reverse Current Protection
FEATURES
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Stable with No Output Capacitor or Any Value
or Type of Capacitor
Input Voltage Range: 1.7V to 5.5V
Ultralow Dropout Voltage: 40mV Typ at
250mA
Excellent Load Transient Response—with or
without Optional Output Capacitor
New NMOS Topology Provides Low Reverse
Leakage Current
Low Noise: 30µV
RMS
Typ (10kHz to 100kHz)
0.5% Initial Accuracy
1% Overall Accuracy (Line, Load, and
Temperature)
Less Than 1µA Max I
Q
in Shutdown Mode
Thermal Shutdown and Specified Min/Max
Current Limit Protection
Available in Multiple Output Voltage Versions
– Fixed Outputs of 1.20V to 5.0V
– Adjustable Outputs from 1.20V to 5.5V
– Custom Outputs Available
DESCRIPTION
The TPS732xx family of low-dropout (LDO) voltage
regulators uses a new topology: an NMOS pass
element in a voltage-follower configuration. This
topology is stable using output capacitors with low
ESR, and even allows operation without a capacitor.
It also provides high reverse blockage (low reverse
current) and ground pin current that is nearly
constant over all values of output current.
The TPS732xx 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 1µA and
ideal for portable applications. The extremely low
output noise (30µV
RMS
with 0.1µF C
NR
) is ideal for
powering VCOs. These devices are protected by
thermal shutdown and foldback current limit.
DCQ PACKAGE
SOT223
(TOP VIEW)
TAB IS GND
OUT
1
4
NR/FB
IN
OUT
GND
EN
NR/FB
2
3
4
5
DBV PACKAGE
SOT23
(TOP VIEW)
IN
GND
EN
1
2
3
5
APPLICATIONS
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Portable/Battery-Powered Equipment
Post-Regulation for Switching Supplies
Noise-Sensitive Circuitry such as VCOs
Point of Load Regulation for DSPs, FPGAs,
ASICs, and Microprocessors
Optional
V
IN
IN
EN
GND
OUT
TPS732xx
NR
Optional
V
OUT
DRB PACKAGE
3mm x 3mm SON
(TOP VIEW)
OUT 1
N/C 2
NR/FB 3
GND 4
8 IN
7 N/C
6 N/C
5 EN
Optional
Typical Application Circuit for Fixed-Voltage Versions
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
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 © 2003–2006, Texas Instruments Incorporated
TI [ TEXAS INSTRUMENTS ]
