ACE73205F

PWM Step-down DC-DC Controller IC

VER 1.1

1

Description

The ACE73205F is a switch-mode PWM step-down DC-DC controller using few external components.

It achieves 5A continuous output current over a wide input supply range with excellent load and line

regulation. The output voltage is internally set at 5V.

The high switching frequency of 550KHz allows tiny external components to be usable. The ACE73205F

is designed to be stable with ceramic output capacitor. Pulse skipping mode is adopted under light load

for high efficiency. Furthermore, the low operating current and low dropout operation make the

ACE73205F is suitable for battery powered systems.

Fault protection includes cycle-by-cycle current limit, short output protection and output overvoltage

protection. In shutdown mode, the ACE73205F draws onl

y 7.5μA(VCC=15V) of supply current. On-chip

soft-start minimizes the inrush supply current and the output overshoot at initial startup.

The ACE73205F is available in a space-saving 8-pin SOP package.

Features

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Wide Input Voltage: 4.8V to 32V

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Operating with an External P-Channel MOSFET

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Output Current Up to 5A

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Fixed Switching Frequency: 550KHz

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Fixed Output Voltage with 1% Accuracy

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Efficiency up to 95%

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Low Drop-Out Mode

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Stable with Low-ESR Output Ceramic Capacitor

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On-Chip Power-On Delay to Debounce Input Supply

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Cycle-by-Cycle Current Limit

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Overvoltage protection

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Frequency Foldback for Output Short Circuit Protection

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Built-in Soft Start

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High Efficiency at Light Load with Pulse Skipping Mode

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Shutdown Current: 7.5uA typical at 15V

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Operating Ambient Temperature -40℃ to 85℃

Application

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Car Charger

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Set-Top Box, Modems

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Pre-regulator

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Distributed Power Systems

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Battery Chargers