AP6503

340kHz 23V 3A SYNCHRONOUS DC/DC BUCK CONVERTER

AP6503

Document number: DS35077 Rev. 1 - 2

1 of 13

www.diodes.com

September 2011

© Diodes Incorporated

Description

The AP6503 is a 340kHz switching frequency external

compensated synchronous DC/DC buck converter. It has

The AP6503 enables continues load current of up to 3A with

efficiency as high as 95%.

The AP6503 features current mode control operation, which

enables fast transient response times and easy loop

stabilization.

The AP6503 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 AP6503 is available in a standard Green SO-8EP

package

with

exposed

PAD

for

improved

thermal

performance and is RoHS compliant.

Pin Assignments

COMP

SW

GND

BS

EN

FB

SS

( Top View )

1

2

3

4

8

7

6

5

IN

SO-8EP

Figure 1. Package Pin Out

Features

•

•

3A continuous Output Current, 4A Peak

•

•

340kHz switching frequency

•

Programmable Soft-Start

•

Enable pin

•

Protection

•

OCP

•

Thermal Shutdown

•

Lead Free Finish/ RoHS Compliant (Note 1)

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

Note:

1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at

http://www.diodes.com/products/lead_free.html.

Typical Application Circuit

Figure 2. Typical Application Circuit

LOAD CURRENT (A)

Efficiency vs. Load Current

01

2

3

V

= 12V

IN

V

= 5V

IN

V

= 3.3V

L = 10µH

OUT

40

50

60

70

80

90

100