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