AAT3236
300mA CMOS High Performance LDO
™
PowerLinear
General Description
Features
The AAT3236 is a MicroPower low dropout (LDO)
linear regulator designed to deliver a continuous
300mA output load current and is capable of han-
dling short duration current peaks up to 500mA.
With a very small footprint SOT23-5 package, it is
ideally suited for portable applications where low
noise, high power supply ripple rejection (PSRR),
extended battery life, and small size are critical.
The AAT3236 features fast transient response and
low output self noise for powering sensitive RF cir-
cuitry. Other features include low quiescent cur-
rent, typically 100µA, and low dropout voltage, typ-
ically 300mV at full output load current. The device
has internal output short-circuit protection and ther-
mal shutdown to prevent damage under extreme
conditions.
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500mA Peak Output Current
Low Dropout - Typically 300mV at 300mA
Guaranteed 300mA Output
High Accuracy: ±1.5%
100µA Quiescent Current
High Power Supply Ripple Rejection
— 70dB at 1kHz
— 50dB at 10kHz
Very Low Self Noise: 45µVrms
Noise Reduction Bypass Capacitor
Short-Circuit Protection
Over-Temperature Protection
Shutdown Mode for Longer Battery Life
Low Temperature Coefficient
Nine Factory-Programmed Output Voltages
SOT23 5-Pin or SC70JW 8-Pin Package
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The AAT3236 also features a low-power shutdown
mode for longer battery life. A bypass pin is pro-
vided to improve PSRR performance by connect-
ing an external capacitor from the device reference
output to ground.
Applications
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Cellular Phones
Notebook Computers
Personal Portable Electronics
Portable Communication Devices
The AAT3236 is available in a Pb-free, space-sav-
ing SOT23-5 or SC70JW-8 package in nine facto-
ry-programmed voltages: 2.5V, 2.7V, 2.8V, 2.85V,
3.0V, 3.1V, 3.3V, 3.5V, or 3.6V.
Typical Application
VIN
VOUT
IN
OUT
BYP
AAT3236
ON/OFF
EN
GND
10nF
1μF
2.2μF
GND
GND
3236.2007.03.1.4
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