AAT3215
150mA CMOS High Performance LDO
General Description
The AAT3215 MicroPower™ Low Dropout Linear
Regulator is ideally suited for portable applications
where low noise, extended battery life and small
size are critical. The AAT3215 has been specifi-
cally designed for very low output noise perform-
ance, fast transient response and high power sup-
ply rejection ratio (PSRR), making it ideal for pow-
ering sensitive RF circuits.
Other features include low quiescent current, typi-
cally 95µA, and low dropout voltage which is typi-
cally less than 140mV at full output current. The
device is output short circuit protected and has a
thermal shutdown circuit for additional protection
under extreme conditions.
The AAT3215 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 an external
capacitor from the AAT3215's reference output to
ground.
The AAT3215 is available in a space saving 5-pin
SOT-23 or 8-pin SC70-JW package in 8 factory
programmed voltages of 2.5V, 2.7V, 2.8V, 2.85V,
2.9V, 3.0V, 3.3V, or 3.5V.
Features
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PowerLinear
™
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Low Dropout - 140mV at 150mA
Guaranteed 150mA Output
High accuracy ±1.5%
95µA Quiescent Current
High Power Supply Ripple Rejection
• 70 dB at 1kHz
• 50 dB at 10kHz
Very low self noise 45µVrms/rtHz
Fast line and load transient response
Short circuit protection
Over-Temperature protection
Uses Low ESR ceramic capacitors
Noise reduction bypass capacitor
Shutdown mode for longer battery life
Low temperature coefficient
8 Factory programmed output voltages
SOT-23 5-pin or SC70-JW 8-pin package
Preliminary Information
Applications
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Cellular Phones
Notebook Computers
Portable Communication Devices
Personal Portable Electronics
Digital Cameras
Typical Application
V
IN
IN
OUT
V
OUT
AAT3215
ON/OFF
EN
GND
1µF
10nF
2.2µF
BYP
GND
GND
3215.2002.03.0.91
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ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
