DATA SHEET
AAT2500
1MHz Step-Down Converter/LDO Regulator
General Description
Features
The AAT2500 is a member of Skyworks' 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.
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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.
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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 Step-Down
Converter
Shutdown Current
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