General Description

The RT9004 is designed for portable RF and wireless applications with demanding performance and space requirements. The RT9004 performance is optimized for battery-powered systems to deliver ultra low noise and low quiescent current. Regulator ground current increases only slightly in dropout, further prolonging the battery life.

特性 Features

? Short Circuit Thermal Folded Back Protection

? Low-Noise for RF Application

? Fast Response in Line/Load Transient

? Quick Start-Up (Typically 50us)

? Low Dropout : 220mV @ 300mA

? Wide Operating Voltage Ranges : 2.5V to 5.5V

? TTL-Logic-Controlled Shutdown Input

? Low Temperature Coefficient

? Thermal Shutdown Protection

? Only 1uF Output Capacitor Required for Stability

? High Power Supply Rejection Ratio

? Custom Voltage Available

? Small 10-Lead VDFN and WDFN Packages

? 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