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AP5004

PWM CONTROL 2.5A STEP-DOWN CONVERTER

AP5004

Document number: DS31444 Rev. 5 - 2

1 of 11

www.diodes.com

August 2010

Description

The AP5004 is a step-down switching regulator with PWM

control and includes a reference voltage source, oscillation

circuit, error amplifier, and an internal NMOS.

AP5004 provides low-ripple power, high efficiency, and

excellent transient characteristics. The PWM control circuit is

able to vary the duty ratio linearly from 0% up to 90%. An

enable function, an over-current protect function, and a short

circuit protect function are built inside, and when OCP or SCP

happens, the operation frequency will be reduced from

300 KHz to 50 KHz. Also, an internal compensation block has

been designed in to minimize the external component count.

With built-in power NMOS, a step-down switching regulator

can easily be built by adding a coil, capacitors, and a diode.

The combination of high efficiency, low standby current, high

input voltage (32V), and high output current (2.5A)in a small

SOP-8L package gives the AP5004 an unprecedented

advantage in any high power system applications.

Features

• Input Voltage: 10V to 32V

• Adjustable Output Voltage from 0.8V to 6V

• Duty Ratio: 0% to 90% PWM control

• Oscillation Frequency: 300KHz typical

• Short Circuit Protect Frequency:50 KHz

• 2uA Maximum Standby Current

• Current Limit, Enable Function

• Thermal Shutdown Function

• Built-in Internal SW N-channel MOS

• SOP-8L: Available in “Green” Molding Compound

(No Br, Sb)

• Lead Free Finish/ RoHS Compliant (Note 1)

Pin Assignments

AP5004

(Top View )

GND

Vcc

Vboost

Output

SOP-8L

Applications

• Microprocessor Core Supply

• Networking Power Supply

• LCD MNT, TV Power Supply

• Telecom Power Supply

Notes: 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.

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Résumé du contenu

AP5004PWM CONTROL 2.5A STEP-DOWN CONVERTER AP5004 Document number: DS31444 Rev. 5 - 2 1 of 11 www.diodes.com August 2010 © Diodes Incorporated

Page 2 - = 100 ~ 300 ohm

AP5004PWM CONTROL 2.5A STEP-DOWN CONVERTER AP5004 Document number: DS31444 Rev. 5 - 2 10 of 11 www.diodes.com August 2010 © Diodes Incorporated

Page 3

AP5004PWM CONTROL 2.5A STEP-DOWN CONVERTER AP5004 Document number: DS31444 Rev. 5 - 2 11 of 11 www.diodes.com August 2010 © Diodes Incorporated

Page 4 - Electrical Characteristics (V

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Page 5

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Page 6 - August 2010

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Page 7 - Test Circuit

AP5004PWM CONTROL 2.5A STEP-DOWN CONVERTER AP5004 Document number: DS31444 Rev. 5 - 2 5 of 11 www.diodes.com August 2010 © Diodes Incorporated

Page 8 - Functional Description

AP5004PWM CONTROL 2.5A STEP-DOWN CONVERTER AP5004 Document number: DS31444 Rev. 5 - 2 6 of 11 www.diodes.com August 2010 © Diodes Incorporated

Page 9 - Bottom Side Layout Guide

AP5004PWM CONTROL 2.5A STEP-DOWN CONVERTER AP5004 Document number: DS31444 Rev. 5 - 2 7 of 11 www.diodes.com August 2010 © Diodes Incorporated

Page 10 - ( Top View )

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Page 11 - AP5004

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