AP1501

150KHz, 3A PWM BUCK DC/DC CONVERTER

AP1501 Rev. 11

1 of 12

JANUARY 2009

www.diodes.com

Lead-free

Lead-free

Lead-free

Lead-free

•

Output voltage: 3.3V, 5V, 12V and adjustable output

version

•

Adjustable version output voltage range, 1.23V to

37V+4%

•

150KHZ +15% fixed switching frequency

•

Voltage mode non-synchronous PWM control

•

Thermal-shutdown and current-limit protection

•

ON/OFF shutdown control input

•

Operating voltage can be up to 40V

•

Output load current: 3A

•

Low power standby mode

•

Built-in switching transistor on chip

•

Lead Free packages: TO263-5L and TO220-5L(R)

•

TO263-5L and TO220-5L(R): Available in “Green”

Molding Compound (No Br, Sb)

•

Lead Free Finish/RoHS Compliant (Note 1)

The AP1501 is a fully integrated step-down DC/DC converter,

with the ability to drive 3A load without the need of additional

driver components. The AP1501 operates at a switching

frequency of 150KHZ enabling the use of small size filter

components. As a result, board space is reduced and BOM costs

are lowered.

The AP1501 has integrated the shutdown function that allows

standby mode to be activated via an external logic signal input.

The internal compensation facilitates feedback control for line

and load regulation without the need of an external circuitry. The

AP1501 has a built-in Thermal shutdown and Current Limit

function to prevent damage from high operating temperature and

high current operating to the output switch.

Additional features include a guaranteed +/- 4% tolerance on the

output voltage under specified input and output load conditions,

and +/- 15% on oscillator frequency. The AP1501 offers both

fixed and a Adjustable output voltages. For fixed outputs the

AP1501 supports 3.3V, 5.0V and 12V. The package options

available are standard 5-lead TO263 and TO220(R) packages.

•

Simple High-efficiency step-down regulator

•

On-card switching regulators

•

Positive to negative converter

Ordering Information

Package

K5 : TO263-5L

Output version

AP1501 - XX XXX X - X

Packing

U : Tube

13 : Tape & Reel

Blank : Adjustable

33

: 3.3V

50

: 5.0V

12

: 12V

Lead Free

L : Lead Free

T5 : TO220-5L

T5R : TO220-5L(R)

G : Green

Device

Package

Code

Packaging

(Note 2)

Tube

13” Tape and Reel

Quantity

Part Number

Suffix

Quantity

Part Number

Suffix

AP1501-XXK5L-U

K5

TO263-5L

50

-U

NA

NA

AP1501-XXK5L-13

K5

TO263-5L

NA

NA

800/Tape & Reel

-13

AP1501-XXK5G-U

K5

TO263-5L

50

-U

NA

NA

AP1501-XXK5G-13

K5

TO263-5L

NA

NA

800/Tape & Reel

-13

AP1501-XXT5L-U

T5

TO220-5L

50

-U

NA

NA

AP1501-XXT5G-U

T5

TO220-5L

50

-U

NA

NA

AP1501-XXT5RL-U

T5R

TO220-5L(R)

50

-U

NA

NA

AP1501-XXT5RG-U

T5R

TO220-5L(R)

50

-U

NA

NA

Notes:

1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied, see EU Directive 2002/95/EC Annex Notes.

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