General Description

The MIC5249 is an efficient, precise 300mA CMOS voltage regulator with power-on reset delay which can be implemented via an external capacitor. It offers 1 initial accuracy, extremely-low-dropout voltage (typically 400mV @ 300mA), and low ground current (typically 85mA) over load.

Features

• 300mA output current

• High PSRR: 65dB@120Hz

• Stable with ceramic output capacitor

• Power-on RESET output with adjustable delay time

• High output accuracy:

– ±1.0 initial accuracy

– ±3.0 over temperature

• Low dropout voltage of 400mV @ 300mA

• Low quiescent current: 85µA

• Zero current shutdown mode

• Thermal shutdown protection

• Current-limit protection

• Tiny MSOP-8 package

Applications

• Cellular phones

• PDAs

• Fiber optic modules