AAT2556 Datasheet | AAT

Description The AAT2556 is a member of Analogic Tech's Total Power Management IC™ (TPMIC™) product family. It is a fully integrated 500m A battery charger plus a 250m A step-down converter. The input voltage range is 4V to 6.5V for the battery charger and 2.7V to 5.5V for the step-down converter, making it ideal for single-cell lithium-ion/polymer batterypowered applications. The battery charger is a plete constant current/ constant voltage linear charger. It offers an integrated pass device, reverse blocking protection, high current accuracy and voltage regulation, charge status, and charge termination. The charging current is programmable via external resistor from 15m A to 500m A. In addition to standard features , the device offers over-voltage, current limit, and thermal protection. Features - System Power™ - - - The step-down converter is a highly integrated - converter operating at 1.5MHz of switching frequency, minimizing the size of external ponents while keeping switching losses low. It .. has independent input and enable pins. The output Applications voltage ranges from 0.6V to the input voltage. The feedback and control deliver excellent load regula- Bluetooth™ Headsets tion and transient response with a small output - Cellular Phones inductor and capacitor. - Handheld Instruments - MP3 and Portable Music Players The AAT2556 is available in a Pb-free, thermally- PDAs and Handheld puters enhanced TDFN33-12 package and is rated over - Portable Media Players the -40°C to +85°C temperature range. Battery Charger: - Input Voltage Range: 4V to 6.5V - Programmable Charging Current up to 500m A - Highly Integrated Battery Charger - Charging Device - Reverse Blocking Diode Step-Down Converter: - Input Voltage Range: 2.7V to 5.5V - Output Voltage Range: 0.6V to VIN - 250m A Output Current - Up to 96% Efficiency - 30µA Quiescent Current - 1.5MHz Switching Frequency - 100µs Start-Up Time Short-Circuit, Over-Temperature, and Current Limit Protection TDFN33-12...