GENERAL DESCRIPTION

The ADP124/ADP125 are low quiescent current, low dropout linear regulators. They are designed to operate from an input voltage between 2.3 V and 5.5 V and to provide up to 500 mA of output current. The low 130 mV dropout voltage at a 500 mA load improves efficiency and allows operation over a wide input voltage range.

FEATURES

Input voltage supply range: 2.3 V to 5.5 V

500 mA maximum output current

Fixed and adjustable output voltage versions

1 initial accuracy

Up to 31 fixed-output voltage options available from 1.75 V to 3.3 V

Adjustable-output voltage range from 0.8 V to 5.0 V

Very low dropout voltage: 130 mV

Low quiescent current: 45 µA

Low shutdown current: <1 µA

Excellent PSRR performance: 60 dB at 100 kHz

Excellent load/line transient response

Optimized for small 1.0 μF ceramic capacitors

Current limit and thermal overload protection

Logic controlled enable

Compact 8-lead exposed paddle MSOP and LFCSP packages

APPLICATIONS

Digital camera and audio devices

Portable and battery-powered equipment

Automatic meter reading (AMR) meters

GPS and location management units

Medical instrumentation

Point of load power