APW7178AQBI-TRG 查看數據表（PDF） - Anpec Electronics

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APW7178AQBI-TRG

1.5MHz, 1A Synchronous Buck Regulator

Anpec Electronics 

APW7178A

1.5MHz, 1A Synchronous Buck Regulator

Features

• 1A Output Current

• Wide 2.7V~6.0V Input Voltage

• Fixed 1.5MHz Switching Frequency

• Low Dropout Operating at 100% Duty Cycle

• Synchronous Rectifier

• 0.6V Reference Voltage

• <0.5µA Input Current During Shutdown

• Short-Circuit Protection

• Over-Temperature Protection

• Available in TDFN2x2-6 Packages

• Lead Free and Green Devices Available

(RoHS Compliant)

Applications

• HD STB

• BT Mouse

• PND Instrument

• Portable Instrument

Pin Configuration

General Description

APW7178A is a 1.5MHz high efficiency monolithic syn-

chronous buck regulator. Design with current mode

scheme, the APW7178A is stable with ceramic output

capacitor. Input voltage from 2.7V to 6.0V makes the

APW7178A ideally suited for single Li-Ion battery pow-

ered applications. 100% duty cycle provides low dropout

operation, extending battery life in portable electrical

devices. The internally fixed 1.5MHz operating frequency

allows the using of small surface mount inductors and

capacitors. The synchronous switches included inside

increase the efficiency and eliminate the need of an ex-

ternal Schottky diode.

The APW7178A is available in TDFN2x2-6 packages.

Simplified Application Circuit

VIN IIN

C1

4.7µF

(MLCC)

APW7178A

VIN SW

NC

RUN FB

GND

L1

2.2µH

VOUT

C2

R1

C3

10µF

(MLCC)

R2

R1 ≤ 1MΩ is recommended

R2 ≤ 200KΩ is recommended

Place C1 closed VIN/GND. Without via hole is recommended.

APW7178A

NC 1

RUN 2

VIN 3

6 FB

5 GND

4 SW

TDFN2x2-6

(Top View)

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.

Copyright © ANPEC Electronics Corp.

1

Rev. A.1 - Sep., 2012

www.anpec.com.tw

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