AP1511

PWM CONTROL 5A STEP-DOWN CONVERTER

AP1511 Rev. 1

1 of 7

NOVEMBER 2007

www.diodes.com

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Input voltage: 3.6V to 23V

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Duty ratio: 0% to 100% PWM control

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Oscillation frequency: 300KHz typ.

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Soft-start, Current limit, Enable function

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Thermal Shutdown function

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Built-in internal SW P-channel MOS

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Lead-Free Package: SOP-16L

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Lead Free Finish/RoHS Compliant (Note 1)

AP1511 consists of step-down switching regulator with PWM

control. These devices include a reference voltage source,

oscillation circuit, error amplifier, internal PMOS and etc.

AP1511 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 100%. This converter also

contains an error amplifier circuit as well as a soft-start circuit that

prevents overshoot at startup. 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 300KHz to 30KHz. Also, an internal

compensation block is built in to minimum external component

count.

With the addition of an internal P-channel Power MOS, a coil,

capacitors, and a diode connected externally, these ICs can function

as step-down switching regulators. They serve as ideal power

supply units for portable devices when coupled with the SOP-16L

mini-package, providing such outstanding features as low current

consumption. Since this converter can accommodate an input

voltage up to 23V, it is also suitable for the operation via an AC

adapter.

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Microprocessor core supply

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Networking power supply

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Telecom power supply

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LCD MNT, TV power supply

AP 1511 X XX

Package

Packing

S : SOP-16L

-U : Tube

-13 : Tape & Reel

Lead Free

L : Lead Free

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

AP1511S

S

SOP-16L

50

-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

Features

General Description

Applications

Ordering Information

Lead-free

Not Recommended

for New Designs