Copyright

© ANPEC Electronics Corp.

Rev. A.4 - Aug., 2013

APW7324

www.anpec.com.tw

1

ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and

advise customers to obtain the latest version of relevant information to verify before placing orders.

4A,5V, 500KHz Synchronous Buck Converter

Features

General Description

•

High Efficiency up to 94%

- Automatic Skip/PWM Mode Operation

•

Adjustable Output Voltage from 0.8V to V

IN

•

Operating from 2.9 to 6V Supply

•

Integrated 85m

Ω High Side / 75mΩ Low Side

MOSFETs

•

Low Dropout Operation: 100% Duty Cycle

•

Stable with Low ESR Ceramic Capacitors

•

Current up to 4A

•

Power-On-Reset Detection on VCC and VIN

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Integrate Soft-Start and Soft-Stop

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Over-Temperature Protection

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Over-Voltage Protection

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Under-Voltage Protection

•

High/ Low Side Current Limit

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Power Good Indication

•

Enable/Shutdown Function

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Available in SOP-8P and TDFN3x3-10 Packages

•

Lead Free and Green Devices Available

(RoHS Compliant)

Applications

•

Notebook Computer & UMPC

•

LCD Monitor/TV

•

Set-Top Box

•

DSL, Switch HUBr

•

Portable Instrument

APW7324 is a synchronous buck converters with inte-

grated 85m

Ω high side and 75mΩ low side power

MOSFETs. The APW7324 with a current-mode control

scheme can convert wide input voltage of 2.9V to 6V to

the output voltage adjustable from 0.8V to 6V to provide

excellent output voltage regulation.

The APW7324 is equipped with an automatic Skip/PWM

mode operation. At light load , the IC operates in the Skip

mode to reduce the switching losses. At heavy load, the

IC works in PWM mode.

The APW7324 is also equipped with Power-on-reset, soft

start, soft-stop, and whole protections (under-voltage,

over-voltage, over-temperature and current-limit) into a

single package.

This device, available in SOP-8P and TDFN3x3-10

packages, provides a very compact system solution ex-

ternal components and PCB area.

Simplified Application Circuit

Pin Configuration

V

OUT

C3

R2

VIN

VCC

EN

GND PGND

FB

LX

C2

R3

APW7324

V

IN

R1

C1

(optional)

L1

C4

OFF

ON

POK

VCC 1

POK 2

GND 3

FB 4

5 EN

6 PGND

7 LX

8 VIN

SOP-8P

(Top View)

PGND 3

10 FB

EN 1

NC 2

LX 5

9 GND

7 VCC

8 POK

LX 4

6 VIN

TDFN3x3-10

(Top View)

Exposed Pad (connected to GND plane

for better heat dissipation