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General Description

The AAT3603 is a member of AnalogicTech’s Total Power Management ICTM (TPMICTM) product family. It contains a single-cell Lithium Ion/Polymer battery charger, a fully integrated step-down converter and 5 low dropout (LDO) regulators. The device is ideal for low cost handheld portable GSM or CDMA mobile telephones.

Features

? Voltage Regulator VIN Range: 4.5V to 6V

? Low Cost Power Integration

? Low Standby Current

? 170μA (typ) w/ Buck (Core), LDO1 (PowerDigital), and LDO2 (PowerAnalog) Active, No Load

? One Step-Down Buck Converter (Core)

? 1.8V, 300mA Output

? 1.5MHz Switching Frequency

? Fast Turn-On Time (120μs typ)

? Five LDOs Programmable with I2C

? LDO1: 3.0V, 300mA (PowerDigital)

? LDO2: 3.0V, 150mA (PowerAnalog or PLL)

? LDO3: 3.0V, 150mA (TCXO)

? LDO4: 3.0V, 150mA (TX)

? LDO5: 3.0V, 150mA (RX)

? PSRR: 60dB@10kHz

? Noise: 50μVrms for LDO3, LDO4, and LDO5

? One Battery Charger

? Digitized Thermal Regulation

? Charge Current Programming up to 1.4A

? Charge Current Termination Programming

? Automatic Trickle Charge for Battery Preconditioning (2.8V Cutoff)

? Adapter OK (ADPP) and Reset (RESET) Timer Outputs

? Separate Enable Pins for Supply Outputs

? Over-Current Protection

? Over-Temperature Protection

? 5x5mm TQFN55-36 Package

Applications

? Digital Cameras

? GSM or CDMA Cellular Phones

? Handheld Instruments

? PDAs and Handheld Computers

? Portable Media Players