The RT9198T is designed for portable RF and wireless applications with demanding performance and space requirements. The RT9198T 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. The RT9198T also works with low-ESR ceramic capacitors, reducing the amount of board space necessary for power applications, critical in hand-held wireless devices. The RT9198T consumes less than 0.01μA in shutdown mode and has fast turn-on time less than 50μs. RT9198T is short circuit thermal folded back protected. RT9198T lowers its OTP trip point from 165°C to 110°C when output short circuit occurs (VOUT < 0.4V) providing maximum safety to end users. The other features include ultra low dropout voltage, high output accuracy, current limiting protection, and high ripple rejection ratio. Available in the SOT-23-3, SOT-23-5 and SC-70-5 packages, the RT9198T also offers a range of 1.5V to 3.5V with 0.1V per step.

应用

CDMA/GSM Cellular Handsets

Battery-Powered Equipment

Laptop, Palmtops, Notebook Computers

Hand-Held Instruments

PCMCIA Cards

Portable Information Appliances

关键特性

Short Circuit Thermal Folded Back Protection

Low-Noise for RF Application

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