AAT2552 Datasheet | AAT

Description The AAT2552 is a fully integrated 500m A battery charger, a 300m A step-down converter, and a 300m A low dropout (LDO) linear regulator. The input voltage range is 4V to 6.5V for the battery charger and 2.7V to 5.5V for the step-down converter and linear regulator, making it ideal for applications operating with single-cell lithium-ion/polymer batteries. The battery charger is a plete constant current/constant voltage linear charger. It offers an integrated pass device, reverse blocking protection, high accuracy current and voltage regulation, charge status, and charge termination. The charging current is programmable via external resistor from 30m A to 500m A. In addition to these standard features , the device offers over-voltage, current limit, and thermal protection. The step-down converter is a highly integrated converter operating at a 1.5MHz switching frequency, minimizing the size of external ponents while keeping switching losses low. The output voltage ranges from 0.6V to the input voltage. The AAT2552 linear regulator is designed for high speed turn-on and turn-off performance, fast transient response, and good power supply ripple rejection. Delivering up to 300m A of load current, it includes short-circuit protection and thermal shutdown. The AAT2552 is available in a Pb-free, thermallyenhanced TDFN34-16 package and is rated over the -40°C to +85°C temperature range. Features - System Power™ - - - - - 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 - Current Sensing Step-Down Converter: - Input Voltage Range: 2.7V to 5.5V - Output Voltage Range: 0.6V to VIN - 300m A Output Current - Up to 96% Efficiency - 45µA Quiescent Current - 1.5MHz Switching Frequency - 120µs Start-Up Time Linear Regulator: - 300m A Output Current - Low Dropout: 400m V at 300m A - Fast Line and Load Transient Response - High Accuracy: ±1.5% - 85µA...