AAT3238
300mA MicroPower™
High Performance LDO Linear Regulator
™
PowerLinear
General Description
Features
The AAT3238 MicroPower low dropout (LDO) linear
regulator is ideally suited for portable applications
where very fast transient response, extended battery
life, and small size are critical. The AAT3238 has
been specifically designed for high-speed turn-on
and turn-off performance, fast transient response,
good power supply ripple rejection (PSRR), and is
reasonably low noise, making it ideal for powering
sensitive circuits with fast switching requirements.
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Low Dropout: 400mV at 300mA
Guaranteed 300mA Output
High Accuracy: ±1.5%
70µA Quiescent Current
Fast Line and Load Transient Response
High-Speed Device Turn-On and Shutdown
High Power Supply Ripple Rejection
Low Self Noise
Short-Circuit Protection
Over-Temperature Protection
Uses Low Equivalent Series Resistance
(ESR) Ceramic Capacitors
Noise Reduction Bypass Capacitor
Shutdown Mode for Longer Battery Life
Low Temperature Coefficient
Other features include low quiescent current, typical-
ly 70µA, and low dropout voltage, typically less than
400mV at the maximum output current level of
300mA. The device is output short-circuit protected
and has a thermal shutdown circuit for additional pro-
tection under extreme operating conditions.
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Factory-Programmed Output Voltages
SOT23 6-Pin or SC70JW 8-Pin Package
The AAT3238 also features a low-power shutdown
mode for extended battery life. A reference bypass
pin has been provided to improve PSRR perform-
ance and output noise by connecting a small exter-
nal capacitor from the AAT3238's reference output to
ground.
Applications
The AAT3238 is available in a Pb-free, space-saving
6-pin SOT23 or 8-pin SC70JW package in factory-
programmed voltages.
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Cellular Phones
Digital Cameras
Notebook Computers
Personal Portable Electronics
Portable Communication Devices
Typical Application
VIN
VOUT
IN
OUT
BYP
AAT3238
ON/OFF
EN
GND
1μF
10nF
2.2μF
GND
GND
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