General Description
The AP2201 is a 150mA output current fixed voltage regulator designed to provide very low noise (45µVrms at 80Hz-100KHz), ultra low dropout voltage (typically 165mV at 150mA), very low quiescent current (1µA maximum) and excellent power supply ripple rejection (PSRR 75dB at 100Hz) in battery powered applications, such as handsets and PDAs and in noise sensitive applications, such as RF electronics.

Features
 • Up to 150mA Regulator Output
 • Low Quiescent Current
 • Low Dropout Voltage: VD=165mV at 150mA
 • High Precision Output Voltage: ±1%
 • Output Noise: 45µVrms at 80Hz-100KHz
 • Good Ripple Rejection Ability: 75dB at 100Hz and IOUT=100µA
 • Tight Load and Line Regulation
 • Low Temperature Coefficient
 • Over Current Protection
 • Thermal Protection
 • Reverse-battery Protection
 • Zero Off-mode Current
 • Logic-controlled Enable

Applications
 • Cellular Phones
 • Cordless Phones
 • Digital Still Cameras
 • Wireless Communicators
 • PDAs / Palmtops
 • PC Mother Board
 • Consumer Electronics