General Description

The RT9503A is a fully integrated low cost single-cell LiIon battery charger IC ideal for portable applications. The RT9503A is capable of being powered up via the AC adapter and USB (Universal Serial Bus) port inputs. The RT9503A can automatically detect and select the AC adapter and the USB port as the power source for the charger. The RT9503A enters sleep mode when both supplies are removed.

Features

Automatic Input Supplies Selection

18V Maximum Rating for AC Adapter

Integrated Selectable 100mA and 500mA USB Charge Current

Internal Integrated Power MOSFETs

AC Adapter Power Good Status Indicator

Charge Status Indicator

External Capacitor Programmable Safety Timer

Under Voltage Protection

Over Voltage Protection

Automatic Recharge Feature

Battery Temperature Monitoring

Small 16-Lead WQFN Package

Thermal Feedback Optimizing Charge Rate

Power Path Controller

RoHS Compliant and Halogen Free

Applications

Digital Cameras

Cellular Phones

PDAs , Smart Phones and MP3 Players

Portable Instruments