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