AP1530

PWM CONTROL 3A STEP-DOWN CONVERTER

AP1530 Rev. 1

1 of 8

MARCH 2007

www.diodes.com

Lead-free

•

Input voltage: 3.6V to 18V

•

•

Duty ratio: 0% to 100% PWM control

•

Oscillation frequency: 300KHz typ.

•

Soft-start, Current Limit, Enable function

•

Thermal Shutdown function

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Built-in internal SW P-channel MOS

•

SOP-8L Pb-Free Package

•

Lead Free Finish/RoHS Compliant (Note 1)

AP1530 consists of step-down switching regulator with PWM control.

These devices include a reference voltage source, oscillation circuit,

error amplifier, internal PMOS.

AP1530 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 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 300KHz to 30KHz. 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 18V, it is also suitable for the operation via an AC

adapter.

•

PC Motherboard

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LCD Monitor

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Graphic Card

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DVD-Video Player

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Telecom Equipment

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ADSL Modem

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Printer and other Peripheral Equipment

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Microprocessor core supply

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Networking power supply

Ordering Information

A P 1 5 3 0 X X X

Package

Packing

S : SOP-8L

Lead Free

L : Lead Free

-U : Tube

-13 : Taping

Note:

1. RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7.

Tube

13” Tape and Reel

Device

Package

Code

Packaging

(Note 2)

Quantity

Part Number

Suffix

Quantity

Part Number

Suffix

AP1530S

S

SOP-8L

100

-U

2500/Tape & Reel

-13

Note:

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

Features

General Description

Applications