ACE7225D

2A, 4.5V~18V Input, 500KHz Synchronous Step-Down Converter

VER 1.1

1

Description

The ACE7225D is a constant frequency, current mode step-down converter. The device integrates a

main switch and a synchronous rectifier for high efficiency without an external Schottky diode. It is ideal

for powering portable equipment that runs from a single cell Lithium-Ion (Li+) battery. The output voltage

can be regulated as low as 0.6V. The ACE7225D can also run at 100% duty cycle for low dropout

operation, extending battery life in portable system. This device offers two operation modes, PWM control

and PFM Mode switching control, which allows a high efficiency over the wider range of the load.

The ACE7225D is offered in a low profile 6-pin, SOT package, and is available in an adjustable version.

Features

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High Efficiency: Up to 96%

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500KHz Constant Frequency Operation

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2A Output Current

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No Schottky Diode Required

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4.5V to 18V Input Voltage Range

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Output Voltage as Low as 0.6V

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Slope Compensated Current Mode Control for Excellent Line and Load Transient Response

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Integrated internal compensation

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Stable with Low ESR Ceramic Output Capacitors

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Over Current Protection with Hiccup-Mode

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Thermal Fault Protection

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Inrush Current Limit and Soft Start

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SOT23-6 Package

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-40°C to +85°C Temperature Range

Application

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Distributed Power Systems

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Digital Set Top Boxes

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Flat Panel Television and Monitors

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Wireless and DSL Modems

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Notebook Computer