ACE7203D

800mA, 2V-6.5V Input,1.5MHz Synchronous Step-Down Converter

VER 1.1

1

Description

The ACE7203D 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 Scotty 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 ACE7203D 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 ACE7203D is offered in a low profile 5-pin, SOT package, and is available in an adjustable version.

Features

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High efficiency :Up to 96%

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1.5MHz Constant Frequency Operation

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800mA Output Current

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No Scotty Diode Required

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2V to 6.5V Input Voltage Range

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Output Voltage as Low as 0.6V

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PFM Mode for High Efficiency in Light Load

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100% Duty Cycle in Dropout Operation

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Low Quiescent Current: 20uA

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

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Short Circuit Protection

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Thermal Fault Protection

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Inrush Current Limit and Soft Start

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<1μA Shutdown Current

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SOT23-5 package

Application

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Cellular and Smart Phones

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PDAs

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Wireless and DSL Modems

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Digital Still and Video Cameras

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DTV

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Portable Instruments