General Description

The MIC5319 is a high-performance, 500mA LDO regulator, offering extremely high PSRR and very-low noise while consuming low ground current.

Features

• Ultra-low dropout voltage 200mV @ 500mA

• Input voltage range: 2.5 to 5.5V

• Stable with ceramic output capacitor

• Low output noise: 40µVrms

• Low quiescent current of 90µA total

• High PSRR, up to 70dB @1kHz

• Fast turn-on-time: 40µs typical

• High-output accuracy:

− ±1.0 initial accuracy

− ±2.0 over temperature

• Thermal-shutdown protection

• Current-limit protection

• Logic-controlled Enable

• Tiny 2mm x 2mm MLF® package, 500mA continuous

• Thin SOT-23-5 package, 500mA peak

Applications

• Cellular phones

• PDAs

• Fiber optic modules

• Portable electronics

• Notebook PCs

• Audio Codec power supplies