AP1580

PWM CONTROL 3A STEP-DOWN CONVERTER

AP1580 Rev. 1

1 of 9

JANUARY 2007

www.diodes.com

Lead-free

•

Input Voltage: 10V to 40V

•

Adjustable Output Voltage from 0.8V to 0.9Vcc

•

Duty Ratio: 0% to 90% PWM control

•

Oscillation Frequency: 300KHz typical

•

Short Circuit Protect Frequency: 30 KHz

•

2uA Maximum Standby Current

•

Current Limit, Enable Function

•

Thermal Shutdown Function

•

Built-in Internal SW N-channel MOS

•

Lead Free Finish/RoHS Compliant for Lead Free

products (Note 1)

•

Lead-Free Package: SOP-8L

AP1580 consists of step-down switching regulator with PWM control.

These devices include a reference voltage source, oscillation circuit,

error amplifier and internal NMOS.

AP1580 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 30 KHz. Also, an internal

compensation block is built to minimize external component count.

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

to be built by adding a coil, capacitors and a diode.

The high efficiency (>90%), low standby current, high input

voltage (40V) and output current (3A) combining with small

SOP-8L package give AP1580 unprecedented advantage in high

power system applications.

•

Microprocessor Core Supply

•

Networking Power Supply

•

LCD MNT, TV Power Supply

•

Telecom Power Supply

Ordering Information

AP 1580 X

X

Package

Packing

- U : Tube

-13 : Taping

X

Lead - Free

L : Lead Free

S: SOP- 8L

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

AP1580S

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

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

Features

General Description

Applications