General Description

The RT8058A is a current mode PWM step-down converter. The chip is ideal for fixed frequency and low ripple applications over full range of load conditions. Its input voltage range is from 2.6V to 5.5V with a constant 1.2MHz switching frequency that allows it to adopt tiny, low cost capacitors and inductors with 2mm or less in height making it ideal for single-cell Li-lon/polymer battery applications.

特性 Features

● 0.6V Reference Allows Low Output Voltage

● Low Dropout Operation : 100 Duty Cycle

● 2A Load Current

● <2μA Shutdown Current

● Up to 95 Efficiency

● No Schottky Diode Required

● 1.2MHz Constant Switching Frequency

● Low RDS(ON) Internal Switches

● Internally Compensated

● Internal Soft-Start

● Over temperature Protection

● Short Circuit Protection

● Small 10-Lead WDFN Package

● RoHS Compliant and Halogen Free

Applications

● Portable Instruments

● Microprocessors and DSP Core supplies

● Cellular Telephones

● Wireless and DSL Modems

● Digital Cameras

● PC Cards