GENERAL DESCRIPTION
The ADP122/ADP123 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 300 mA of output current. The low 85 mV dropout voltage at a 300 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
    300 mA maximum output current
    Fixed and adjustable output voltage versions
    Very low dropout voltage: 85 mV at 300 mA load
    Low quiescent current: 45 µA at no load
    Low shutdown current: <1 µA
    Initial accuracy: ±1% accuracy
    Up to 31 fixed-output voltage options available from 1.75 V to 3.3 V
    Adjustable-output voltage range 0.8 V to 5.0 V (ADP123)
    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 packages: 5-lead TSOT and 6-lead 2 mm × 2 mm LFCSP

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-sale equipment