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AP1509-XXS

150KHz, 2A PWM BUCK DC/DC CONVERTER

Diodes Incorporated. 

AP1509

150KHz, 2A PWM BUCK DC/DC CONVERTER

Features

General Description

• Output Voltage: 3.3V, 5V, 12V and Adjustable Output

Version

• Adjustable Version Output Voltage Range, 1.23V to

18V+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 22V

• Output Load Current: 2A

• SOP-8L Packages

• Low Power Standby Mode

• Built-in Switching Transistor On Chip

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

Br, Sb)

• Lead Free Finish/RoHS Compliant for Lead Free and

“Green” products (Note 1)

The AP1509 series are monolithic IC designed for a step-down

DC/DC converter, and own the ability of driving a 2A load without

additional transistor. It saves board space. The external

shutdown function can be controlled by logic level and then come

into standby mode. The internal compensation makes feedback

control having 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. If

current limit function occurs and VFB is down below 0.5V, the

switching frequency will be reduced. The AP1509 series operates

at a switching frequency of 150KHz thus allow 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 included fixed 3.3V, 5V, 12V, and an

adjustable type. The chips are available in a standard 8-lead

SOP-8 package.

Applications

• Simple High-Efficiency Step-Down Regulator

• On-Card Switching Regulators

• Positive to Negative Converter

Ordering Information

AP1509 XX X X X

Output version

Package

Lead Free

Blank : Adjustable

33 : 3.3V

50 : 5.0V

12 : 12V

S: SOP-8L

L: Lead Free

G: Green

Packing

-U : Tube

-13: Taping

Device

AP1509-XXS

Package Packaging

Code (Note 1)

S

SOP-8L

Tube

Quantity

Part Number

Suffix

100

-U

-13” Tape and Reel

Quantity

Part Number

Suffix

2500/Tape & Reel

-13

Note: 1. 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.

AP1509 Rev. 1

1 of 12

www.diodes.com

DECEMBER 2006

© Diodes Incorporated

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