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