AAT2554 Datasheet | AAT

Description The AAT2554 is a fully integrated 500m A battery charger, a 250m 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 lithiumion/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 15m A to 500m A. In addition to these 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 a 1.5MHz switching frequency, minimizing the size of external ponents while keeping switching losses low. It .. has - independent input and enable pins. The output voltage ranges from 0.6V to the input voltage. - - The AAT2554 linear regulator is designed for fast transient response and good power supply ripple rejection. Designed for 300m A of load current, it includes short-circuit protection and thermal shutdown. Applications The AAT2554 is available in a Pb-free, thermallyenhanced TDFN34-16 package and is rated over 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 Linear Regulator: - 300m A Output Current - Low Dropout: 400m V at 300m A - Fast Line and Load Transient Response - High Accuracy: ±1.5% -...