ACE7445LA

42V, 1.6MHz, 600mA Step-Down Converter

VER 1.1

1

Description

The ACE7445LA is a wide input range, high- efficiency, and high frequency DC-to-DC step- down

switching regulator, capable of delivering up to 0.6A of output current.

With a fixed switching frequency of 1.6MHz, this current mode PWM controlled converter allows the use

of small external components, such as ceramic input and output caps, as well as small inductors.

Including cold crank and double battery jump- starts, the minimum input voltage may be as low as 4.5V

and the maximum up to 42V, with even higher transient voltages. With these high input voltages, linear

regulators cannot be used for high supply currents without overheating the regulator. Instead, high

efficiency switching regulators such as ACE7445LA must be used to minimize thermal dissipation.

ACE7445LA is available SOT23-6 Packages.

Features

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Wide Input Operating Range from 4.5V to 42V

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435m

Ω internal NMOS

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Up to 94% Efficiency at 18V in 12V out L=47uH with 350mA loading

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Internal compensation

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Capable of Delivering 600mA continuous output current

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Fixed 1.6MHz PWM operation

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Internal soft start

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Output voltage adjustable down to 0.795V

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Cycle-by-cycle current limit

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Current Mode control

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Short-circuit protection

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Logic Control Shutdown EN can be short to VIN

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Thermal shutdown and UVLO

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Available in SOT23-6 Package

Application

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Smart/Industrial/Power Meters

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Industrial Applications

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Automotive Applications