FAN6520B

更新时间： 2024-09-27 04:18:11

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		控制器
页数	文件大小	规格书
14页	547K
描述
Single Synchronous Buck PWM Controller

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FAN6520B 数据手册

February 2006

FAN6520B

Single Synchronous Buck PWM Controller

Features

Description

■ Accepts 1.5V to 5V for V

The FAN6520B makes simple work out of implementing

a complete control and protection scheme for a DC-DC

stepdown converter.

■ Output Range 0.8V to V

– 0.8V Internal Reference

– ±1.5% Over Line Voltage and Temperature

■ Drives N-Channel MOSFETs

■ Simple Single-Loop Control Design

– Voltage-Mode PWM Control

■ Fast Transient Response

– High-Bandwidth Error Ampliﬁer

– Full 0% to 100% Duty Cycle

■ Small Converter Size

Designed to drive N-channel MOSFETs in a synchro-

nous buck topology, the FAN6520B integrates the con-

trol, output adjustment, and monitoring functions into a

single 8-lead package.

The FAN6520B is easy to use, employs a single feed-

back loop, and voltage-mode control with fast transient

response. The output voltage can be precisely regulated

to as low as 0.8V, with a maximum tolerance of ±1.5%

over temperature and line voltage variations. A ﬁxed fre-

quency oscillator reduces design complexity, while bal-

ancing typical application cost. The error ampliﬁer

features a 15MHz gain-bandwidth product and an 8V/µs

slew rate which enables high converter bandwidth for

fast transient performance. The resulting PWM duty

cycles range from 0% to 100%.

– 300kHz Fixed Frequency Oscillator

– Internal Soft-Start

– 8-Lead SOIC

Applications

■ Power Supplies for PC Subsystems and Peripherals

■ MCH, GTL, and AGP Supplies

■ Cable Modems, Set Top Boxes, and DSL Modems

■ DSP, Memory

The FAN6520B is rated for operation from 0° to +70°C

with the FAN6520BI rated from –40° to +85°C.

■ Low-Voltage Distributed Power Supplies

■ ACPI Power Control

■ 5V Input DC-DC Regulator

Ordering Information

Part Number

Temperature Range

0°C to 70°C

Package

SOIC-8

Packing

Rails

FAN6520BM

FAN6520BMX

FAN6520BIM

FAN6520BIMX

0°C to 70°C

Tape and Reel

Rails

–40°C to 85°C

Tape and Reel

www.fairchildsemi.com

FAN6520B Rev. 1.0.3

12 3 4 5 6 7...14

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