FAN5037 Datasheet

IC型號：
FAN5037
PDF描述：
Adjustable Switching Regulator Controller
文件大小：
103.71KB
PDF頁數(shù)：
11頁
芯片廠家：
FAIRCHILD

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FAN5037

Adjustable Switching Regulator Controller

Features

鈥?High power switch-mode DC-DC controller can provide

in excess of 13A

鈥?Output voltage adjustable from 1.2V to 3.6V

鈥?85% ef鏗乧iency

鈥?Cumulative accuracy < 3% over line, load, and

temperature variations

鈥?Overvoltage and short circuit protection

鈥?Built-in soft start

鈥?No overshoot at turn-on

Description

The FAN5037 is a high power, switch-mode DC-DC control-

ler that provides ef鏗乧ient power for all low-voltage applica-

tions. This controller has a built-in Soft Start feature which

offers system protection during power-up by reducing both

inrush current and output overshoot. When combined with

the appropriate external circuitry, the FAN5037 can deliver

load currents as high as 13A at ef鏗乧iencies as high as 88%.

The FAN5037 can generate output voltages from 1.2V up to

3.6V using external resistors.

The FAN5037 is designed to operate in a constant on-time

control mode under all load conditions. Its accurate low TC

reference eliminates the need for precision external compo-

nents in order to achieve the tight tolerance voltage regula-

tion required by many applications. Short circuit current

protection is provided through the use of a current sense

resistor, while overvoltage protection is provided internally.

Applications

鈥?/div>

I/O and AGP power for desktop computers

High ef鏗乧iency power for ASICs

High ef鏗乧iency power for DSPs

Adjustable step-down power supplies

Block Diagram

VCCA 2

IFBL 4

+12V

+5V

FAN5037

Feedback Control

IFBH 3

VCCP 8

CEXT

Oscillator

Digital Logic

DRV

Vout

1.20V

Reference

VFB 5

GNDP 6

REV. 1.0.3 9/26/01

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