AP1501A

150KHz, 5A PWM BUCK DC/DC CONVERTER

AP1501A Rev. 7

1 of 12

SEPTEMBER 2008

www.diodes.com

Lead-free

Lead-free

Lead-free

Lead-free

Features

General Description

The AP1501A series are monolithic ICs that are designed for a

step-down DC/DC converter, and possess the ability to drive a

5A load without additional transistor component. Due to reducing

the number of external component, the board space can be

saved easily. The external shutdown function can be controlled

by logic level and then come into standby mode. The internal

compensation makes feedback control have good line and load

regulation without external design. Regarding protected function,

thermal shutdown is to prevent over temperature operating from

damage, and current limit is against over current operating of the

output switch. The AP1501A series operates at a switching

frequency

of

150Khz

thus

allowing

smaller

sized

filter

components than what would be needed with lower frequency

switching regulators. Other features include a guaranteed +4%

tolerance on output voltage under specified input voltage and

output load conditions, and +15% on the oscillator frequency.

The output version includes fixed 3.3V, 5V, 12V, and an

adjustable type. The packages are available in a standard 5-lead

TO263 and TO220 packages.

•

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: 5A

•

Low power standby mode

•

Built-in switching transistor on chip

•

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

•

TO263-5L: Available in “Green” Molding Compound

(No Br, Sb)

•

Lead Free Finish/RoHS Compliant (Note 1)

Applications

•

Simple High-efficiency step-down regulator

•

On-card switching regulators

•

Positive to negative converter

Ordering Information

Package

K5 : TO263-5L

Output Version

AP1501A - 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

Tube

13” Tape and Reel

Device

Package

Code

Packaging

(Note 2)

Quantity

Part Number

Suffix

Quantity

Part Number

Suffix

AP1501A-XXK5L-U

K5

TO263-5L

50

-U

NA

NA

AP1501A-XXK5L-13

K5

TO263-5L

NA

NA

800/Tape & Reel

-13

AP1501A-XXK5G-U

K5

TO263-5L

50

-U

NA

NA

AP1501A-XXK5G-13

K5

TO263-5L

NA

NA

800/Tape & Reel

-13

AP1501A-XXT5L-U

T5

TO220-5L

50

-U

NA

NA

AP1501A-XXT5RL-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

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