AP65403

Document number: DS37126 Rev. 1 - 2

1 of 15

www.diodes.com

March 2014

© Diodes Incorporated

AP65403

LIGHT LOAD IMPROVED 4A, 750kHz SYNCH DC/DC BUCK CONVERTER

Description

The AP65403 is a 750kHz switching frequency external compensated

and low side MOSFETs.

The AP65403 enables continues load current of up to 4A with

efficiency as high as 96%.

The AP65403 implements an automatic custom light load efficiency

improvement algorithm.

The AP65403 features current mode control operation, which enables

fast transient response times and easy loop stabilization.

The

AP65403

simplifies

board

layout

and

reduces

space

requirements with its high level of integration and minimal need for

external

components,

making

it

ideal

for

distributed

power

architectures.

The AP65403 is available in a standard Green SO-8EP package and

is RoHS compliant.

Features

•

•

4A Continuous Output Current, 7A Peak

•

Efficiency Up to 96%

•

Automated Light Load improvement

•

•

750kHz Switching Frequency

•

External Programmable Soft-Start

•

Enable Pin

•

OCP with Hiccup and Thermal Protection

•

Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)

•

Halogen and Antimony Free. “Green” Device (Note 3)

Pin Assignments

Applications

•

Gaming Consoles

•

Flat Screen TV sets and Monitors

•

Set Top Boxes

•

Distributed power systems

•

Home Audio

•

Consumer electronics

•

Network Systems

•

FPGA, DSP and ASIC Supplies

•

Green Electronics

Notes:

1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.

2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"

and Lead-free.

3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and

<1000ppm antimony compounds.

Typical Applications Circuit

Figure 1 Typical Application Circuit