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AAT2505

AAT
Part Number AAT2505
Manufacturer AAT
Description Step-Down Converter/Linear Regulator
Published Apr 30, 2007
Detailed Description Dual Channel, Step-Down Converter/Linear Regulator General Description The AAT2505 is a member of AnalogicTech's Total P...
Datasheet PDF File AAT2505 PDF File

AAT2505
AAT2505

Overview
Dual Channel, Step-Down Converter/Linear Regulator General Description The AAT2505 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 cell lithium-ion / polymer batteries.
The LDO has an independent input pin and is capable of delivering up to 300mA of current.
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, low dropout voltage, and a Power-OK (POK) open drain output signaling when VOUT is in regulation.
The 600mA step-down converter is designed to operate with 1.
4MHz of switching frequency, minimizing external component size and cost while maintaining a low 27µA no load quiescent current.
AAT2505 Features • • SystemPower™ • • • • VIN Range: 2.
7V to 5.
5V 300mA LDO — 400mV Dropout Voltage at 300mA — High Accuracy: ±1.
5% — Fast Line / Load Transient Response — Power OK Output 600mA Step-Down Converter — Up To 98% Efficiency — 27µA No Load Quiescent Current — Shutdown Current <1µA — Low RDS(ON) Integrated Power Switches — Fast Turn-On Time (150µs Typical) — Low Dropout 100% Duty Cycle — 1.
4MHz Switching Frequency — Internal Soft Start Over-Temperature and Current Limit Protection TDFN33-12 Package -40°C to +85°C Temperature Range Peak current mode control with internal compensation provides a stable converter with a low equivwww.
DataSheet4U.
com alent series resistance (ESR) ceramic output Applications capacitor for extremely low output ripple.
For maximum battery life with high voltage outputs, the step-down converter duty cycle increases to 100%.
The output voltage is either fixed or adjustable with an integrated P- and N-channel MOSFET power stage and 1.
4MHz switching frequency.
The AAT2505 is available in a Pb-free, 12...


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