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General Description

The AAT3601 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 also includes 2 load switches for dynamic power path/sleep mode operation, making it ideal for small portable short-range communications enabled mobile devices and telephones.

Features

? Voltage Regulator VIN Range: 4.5V to 6V

? Complete Power Integration

? Integrated Load Switches to Power Converters from AC Adapter or Battery Automatically

? Low Standby Current

? 200μA (typ) w/LDO1, LDO2 and LDO5 Active, No Load

? One Step-Down Buck Converter (NP)

? 1.24V, 300mA Output

? 1.5MHz Switching Frequency

? Fast Turn-On Time (120μs typ)

? Five LDOs Programmable by I2C

? LDO1: 3.4V, 150mA (PE)

? LDO2: 3.4V, 300mA (NP)

? LDO3: 1.24V, 300mA (PE)

? LDO4: 1.85V, 300mA (NP)

? LDO5: 1.85V, 300mA (PE)

? PSRR: 60dB @10kHz

? Noise: 50μVrms

? 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)

? Watchdog (WDI) Timer Input

? Two Reset (RSTIN, RSTLPW) Timer Outputs

? Separate Enable Pins for PE and NP Supplies

? Digital Programming of Major Parameters via I2C

? 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

? Short-Range Communication Headsets