General Description

The RT9511 is a fully integrated low cost solution with a single-cell Li-Ion battery charger and two high efficiency step-down DC/DC converters ideal for portable applications.

Features

● Battery Charger

► Automatic Input Supplies Selection

► 18V Maximum Rating for AC Adapter

► Integrated Selectable 100mA and 500mA USB Charge Current

► Internal Integrated Power FETs

► Charge Status Indicator

► External Capacitor Programmable Safety Timer

► Under Voltage Protection

► Over Voltage Protection

► Automatic Recharge Feature

► Battery Temperature Monitoring

► Thermal Feedback Optimizing Charge Rate

► Power Path Controller

● Step-Down DC/DC Converter

► Adjustable Output from 0.6V to VIN

► 1A Output Current

► 95 Efficiency

► No Schottky Diode Required

► 1.5MHz Fixed-Frequency PWM Operation

● Small 24-Lead WQFN Package

● RoHS Compliant and Halogen Free

Applications

● MP3/MP4 Player

● GPS

● Digital Photo Frame

● Hand held Device