ACE735E

36V Input Standoff Voltage, 1.5A Step-Down Converter

VER 1.1

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Description

The ACE735E is a wide input range, high-efficiency, and high frequency DC-to-DC step-down switching

regulator, capable of delivering up to 1.5A of output current. With a fixed switching frequency of 650KHz,

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. ACE735E also employs a proprietary control

scheme that switches the device into a power save mode during light load, thereby extending the range of

high efficiency operation. An OVP function protects the IC itself and its downstream system against input

voltage surges. With this OVP function, the IC can stand off input voltage as high as 42V, making it an

ideal solution for industrial applications such as smart meters as well as automotive applications.

In automotive systems, power comes from the battery, with its voltage typically between 9V and 24V.

Including cold crank and double battery jump-starts, the minimum input voltage may be as low as 4V and

the maximum up to 36V, 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 ACE735E must be used to minimize thermal dissipation.

ACE735E is available in a space-saving SOT23-6 package.

Features

 Wide Input Operating Range from 4V to 36V

 Standoff Input Voltage: 38V

 High Efficiency at 12V In 5V Out: Up to 91%

 High Efficiency PFM mode at light load

 Capable of Delivering 1.5A

 No External Compensation Needed

 Current Mode control

 Logic Control Shutdown

 Thermal shutdown and UVLO

 Available in SOT23-6 Package

Application

 Smart Meters

 Industrial Applications

 Automotive Applications