General Description
The RT9167/A is a 300mA/500mA low dropout and low noise micropower regulator suitable for portable applications. The output voltages range from 1.5V to 5V in 100mV increments and 2% accuracy. The RT9167/A is designed for use with very low ESR capacitors. The output remains stable even with 1μF ceramic output capacitor.
The RT9167/A uses an internal P-MOSFET as the passdevice, which does not cause extra GND current in heavy
load and dropout conditions. The shutdown mode of nearly zero operation current makes the IC suitable for batterypowered devices. Other features include a reference bypass pin to improve low noise performance, current
limiting, and over temperature protection.

Features
Stable with Low-ESR Output Capacitor
Low Dropout Voltage (350mV @ 300mA)
Low Operation Current −80μA Typical
Shutdown Function
Low Noise Output
Low Temperature Coefficient
Current and Thermal Limiting
Custom Voltage Available
SOT-23-5 and SOP-8 Packages
RoHS Compliant and 100% Lead (Pb)-Free
Applications
Cellular Telephones
Laptop, Notebook, and Palmtop Computers
Battery-powered Equipment
Hand-held Equipment