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