General Description

The RT9193 is designed for portable RF and wireless applications with demanding performance and space requirements. The RT9193 performance is optimized for battery-powered systems to deliver ultra low noise and

low quiescent current. A noise bypass pin is available for further reduction of output noise. Regulator ground current increases only slightly in dropout, further prolonging the battery life. The RT9193 also works with low-ESR ceramic capacitors, reducing the amount of board space necessary for power applications, critical in hand-held wireless devices. The RT9193 consumes less than 0.01μA in shutdown mode and has fast turn-on time less than 50μs.

Features

Ultra-Low-Noise for RF Application

Ultra-Fast Response in Line/Load Transient

Quick Start-Up (Typically 50μs)

< 0.01μA Standby Current When Shutdown

Low Dropout : 220mV @ 300mA

Wide Operating Voltage Ranges : 2.5V to 5.5V

TTL-Logic-Controlled Shutdown Input

Low Temperature Coefficient

Current Limiting Protection

Thermal Shutdown Protection

Only 1μF Output Capacitor Required for Stability

High Power Supply Rejection Ratio

Custom Voltage Available

RoHS Compliant and 100% Lead (Pb)-Free

Applications

CDMA/GSM Cellular Handsets

Battery-Powered Equipment

Laptop, Palmtops, Notebook Computers

Hand-Held Instruments

PCMCIA Cards

Portable Information Appliances