APW7063 查看數據表（PDF） - Anpec Electronics

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APW7063

Synchronous Buck PWM and Linear Controller

Anpec Electronics 

APW7063

Synchronous Buck PWM and Linear Controller

Features

General Description

• Provide Two Regulated Voltages

- Synchronous Rectified Buck PWM Controller

- Linear Controller

• Fast Transient Response

- 0~85% Duty Ratio

• Excellent Output Voltage Regulation

- 0.8V Internal Reference

- ±1% Over Line Voltage and Temperature

• Over Current Protection

- Sense Low-Side MOSFET’s RDS(ON)

• Under Voltage Lockout

• Small Converter Size

- 250KHz Free-Running Oscillator

- Programmable From 70kHz to 800kHz

• 14-Lead SOIC Package

• Lead Free Available (RoHS Compliant)

Applications

• Graphic Cards

• Memory Power Supplies

• DSL or Cable MODEMs

• Set Top Boxes

• Low-Voltage Distributed Power Supplies

The APW7063 integrates PWM and linear controller,

as well as the monitoring and protection functions into

a single package. The synchronous PWM cont roller

which drives dualN-channel MOSFETs, which provides

one controlled power outputs with under-voltage and

over-current protect ions . Linear cont roller drives an

ext ernal N-c hannel MOS FE T with under-volt age

protection.

APW7063 provides excellent regulation for output load

variation. An internal 0.8V temperature-compensated

reference voltage is designed to meet the various low

output voltage applications . A PW 7063 inc ludes a

250kHz free-running t riangle-wave osc illator that is

adjust able from below 70KHz to over 800KHz.

A power-on-reset (POR) circuit limits the VCC minimum

opearting s upply voltage to ass ure the c ontroller

working well. Over current protec tion is achieved by

monit oring t he volt age drop ac ros s the low s ide

MOSFET, eliminating the need for a current sensing

resistor and short circuit condition is detected through

the FB pin. The over-current protection t riggers the

soft -start function until the fault events be removed,

but Under-voltage protection will shutdown IC directly.

Pull the COMP pin below 0.4V will shutdown t he

controller, and both gate drive signals will be low.

Pinouts

RT 1

SS 2

VREG 3

FB 4

COMP 5

GND 6

PHASE 7

14 FBL

13 DRIVE

12 VCC

11 LGATE

10 PGND

9 BOOT

8 UGATE

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.

C opyright © ANPEC Electronics C orp.

1

Rev. A.7 - Nov., 2005

www.anpec.com.tw

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