AP2004

PWM BUCK CONTROLLER

AP2004 Rev. 2

1 of 8

DECEMBER 2006

www.diodes.com

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PWM Buck Control Circuitry

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Operating voltage can be up to 27V

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Under voltage Lockout (UVLO) Protection

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Short Circuit Protection (SCP)

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Soft-start circuit

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Variable Oscillator Frequency -- 300Khz Max

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1.25V voltage reference Output

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8-pin SOP package

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Lead Free Finish/ RoHS Compliant for Lead Free and

“Green” products (Note 1)

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SOP-8L: Available in “Green” Molding Compound (No

Br, Sb)

The AP2004 integrates Pulse-Width-Modulation (PWM) control

circuit into a single chip, mainly designs for power-supply

regulator. All the functions include an on-chip 1.25V reference

output, an error amplifier, an adjustable oscillator, a soft-start,

UVLO, SCP circuitry, and a push-pull output circuit. Switching

frequency is adjustable by trimming CT. During low VCC situation,

the UVLO makes sure that the outputs are off until the internal

circuit operates normally.

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Backlight inverter

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LCD Monitor

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CDROM, XDSL Product

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DC/DC converters in computers, etc.

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

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.

Features

General Description

Applications

Ordering Information

Tube

13” Tape and Reel

Device

(Note 2)

Package

Code

Packaging Quantity

Part Number

Suffix

Quantity

Part Number

Suffix

AP2004S

S

SOP-8L

100

- U

2500/Tape & Reel

-13

AP 2004 X X X

Package

Packing

S: SOP-8L

-U : Tube

-13 : Taping

Lead-Free

G : Green

L : Lead Free