GENERAL DESCRIPTION
The ADP151 is an ultralow noise, low dropout linear regulator that operates from 2.2 V to 5.5 V and provides up to 200 mA of output current. The low 140 mV dropout voltage at 200 mA load improves efficiency and allows operation over a wide input voltage range.

FEATURES
    Ultralow noise: 9 µV rms
    No noise bypass capacitor required
    Stable with 1 µF ceramic input and output capacitors
    Maximum output current: 200 mA
    Input voltage range: 2.2 V to 5.5 V
    Low quiescent current IGND = 10 µA with 0 load IGND = 265 μA with 200 mA load
    Low shutdown current: <1 µA
    Low dropout voltage: 140 mV at 200 mA load
    Initial accuracy: ±1%
    Accuracy over line, load, and temperature: ±2.5%
    16 fixed output voltage options: 1.1 V to 3.3 V
    PSRR performance of 70 dB at 10 kHz
    Current-limit and thermal overload protection
    Logic controlled enable
    Internal pull-down resistor on EN input
    5-lead TSOT package
    6-lead LFCSP package
    4-ball, 0.4 mm pitch WLCSP

APPLICATIONS
    RF, VCO, and PLL power supplies
    Mobile phones
    Digital camera and audio devices
    Portable and battery-powered equipment
    Post dc-to-dc regulation
    Portable medical devices