SC4524 데이터 시트보기 (PDF) - Semtech Corporation

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SC4524

Programmable Frequency, 2A Output 30V Step-Down Switching Regulator

Semtech Corporation 

SC4524

POWER MANAGEMENT

Block Diagrams

C OMP

6

FB

7

SS

5

-

EA

+

+

PWM

-

1V

0 .7 V

REFERENCE

& THERMA L

SHUTDOW N

FAU L T

SLO PE

CO MP

+

S

+

SLOPE

C OMP

+

ISEN

-

+

IL IM

-

20m V

BST

8

S

Q

R

2 VIN

6 .3 m W

POWER

TR AN SIST OR

FB

Soft-Start

And

O verload

Hiccup

Control

1 SW

OVLD

4 GND

ROSC

3

SLOPE COMP

CLK

OS C IL L ATOR

Figure 2. SC4524 Functional Diagram

FB

0 .7 V

SS

+

-

1 .8 m A

1V/2 V

S

Q

R

OVLD

FAU L T

2 .6 m A

Figure 3. Details of the Soft-Start and Overload Hiccup Control Circuit

 2006 Semtech Corp.

5

www.semtech.com

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