AAT2500IWP-AG-T1

1MHz Step-Down Converter/LDO Regulator General Description The AAT2500 is a member of AnalogicTech's Total Power Management IC™ (TPMIC™) product family. It is a low dropout (LDO) linear regulator and a step-down converter with an input voltage range of 2.7V to 5.5V, making it ideal for applications with single lithium-ion/polymer batteries. The LDO has an independent input and is capable of delivering up to 300mA. The linear regulator has been designed for high-speed turn-on and turn-off performance, fast transient response, and good power supply rejection ratio (PSRR). Other features include low quiescent current and a low dropout voltage. The 400mA step-down converter is designed to minimize external component size and cost while maintaining a low 25µA no load quiescent current. Peak current mode control with internal compensation provides a stable converter with a low equivalent series resistance (ESR) ceramic output capacitor for extremely low output ripple. For maximum battery life, the step-down converter increases to 100% duty cycle and has a typical 180mV dropout voltage at 400mA. The output voltage is either fixed or adjustable with an integrated P- and N-channel MOSFET power stage and 1MHz switching frequency. The AAT2500 is available in a 12-pin TDFN33 or STDFN33 package, and is rated over a temperature range of -40°C to +85°C. AAT2500 Features • • • • • • • • • • • • • • • • SystemPower™ VIN Range: 2.7V to 5.5V 300mA LDO Current Output 400mV LDO Dropout Voltage at 300mA High Output Accuracy: ±1.5% Fast LDO Line / Load Transient Response 400mA, 96% Efficiency Step-Down Converter 25µA No Load Quiescent Current for StepDown Converter Shutdown Current