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AP5002

PWM CONTROL 2A STEP-DOWN CONVERTER

Diodes Incorporated. 

AP5002

PWM CONTROL 2A STEP-DOWN CONVERTER

Features

General Description

• Input voltage: 3.6V to 20V

• Output voltage: 0.8V to VCC

• Duty ratio: up to 100% PWM control

• Oscillation frequency: 500KHz typical

• Soft-start Current Limit, Enable function

• Thermal Shutdown function

• Built-in internal SW P-channel MOS

• Low ESR output capacitor (MLCC, multi-layer ceramic

capacitor) support

• Efficiency 90%

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

(No Br, Sb)

• Lead Free Finish / RoHS Compliant (Note 1)

AP5002 consists of step-down switching regulator with

PWM control. These devices include a reference voltage source,

oscillation circuit, error amplifier, internal PMOS.

AP5002 provides low-ripple power, high efficiency, and excellent

transient characteristics. The PWM control circuit is able to vary

the duty ratio linearly up to 100%. This converter also contains

an error amplifier circuit as well as a soft-start circuit that prevents

overshoot at startup. 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 500KHz to 50KHz. Also, an internal compensation

block is built in to minimum external component count.

With the addition of an internal P-channel Power MOS, a coil,

capacitors, and a diode connected externally, these ICs can

function as step-down switching regulators. They serve as ideal

power supply units for portable devices when coupled with the

SOP–8L mini-package, providing such outstanding features as

low current consumption. Since this converter can accommodate

an input voltage up to 22V, it is also suitable for the operation via

an AC adapter.

Applications

• PC Motherboard

• LCD Monitor

• Graphic Card

• DVD-Video Player

• Telecom Equipment

• ADSL Modem

• Printer and other Peripheral Equipment

• Microprocessor core supply

• Networking power supply

Ordering Information

AP5002 S G - 13

Package

S : SOP-8L

Green

G : Green

Packing

13 : Tape & Reel

Device

AP5002SG-13

Package

Code

S

Packaging

(Note 2)

SOP-8L

13” Tape and Reel

Quantity

Part Number Suffix

2500/Tape & Reel

-13

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.

2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at

http://www.diodes.com/datasheets/ap02001.pdf.

AP5002 Rev. 8

1 of 10

www.diodes.com

FEBRUARY 2009

© Diodes Incorporated

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