General Description

The RT9503 is a fully integrated low cost single-cell LiIon battery charger IC ideal for portable applications. The

RT9503 is capable of being powered up from AC adapter and the USB (Universal Serial Bus) port inputs. The

RT9503 can automatically detect and select the AC adapter and the USB port as the power source for the

charger. The RT9503 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 FETs 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 100% Lead (Pb)-Free

Applications

Digital Cameras

Cellular Phones

PDAs and Smart Phones and MP3

Portable Instruments