General Description

The RT9187 is a high-performance, 1A LDO regulator, offering extremely high PSRR and ultra-low dropout. Ideal

for portable RF and wireless applications with demanding performance and space requirements.

Features

Ultra-Low-Noise for RF Application

Ultra-Fast Response in Line/Load Transient

Quick Start-Up (Typically 40μs)

< 0.1uA Standby Current When Shutdown

Low Dropout : 240mV at 1A

Wide Operating Voltage Ranges : 2.5V to 5.5V

TTL-Logic-Controlled Shutdown Input

Current Limiting Protection

Thermal Shutdown Protection

Only 2.2uF Output Capacitor Required for Stability

High Power Supply Rejection Ratio

RoHS Compliant and 100% Lead (Pb)-Free

Applications

CDMA/GSM Cellular Handsets

Battery-Powered Equipment

Laptop, Palmtops, Notebook Computers

Hand-Held Instruments

Mini PCI & PCI-Express Cards

PCMCIA & New Cards

Portable Information Appliances