SC4519HEVB 데이터 시트보기 (PDF) - Semtech Corporation

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SC4519HEVB

600kHz, 3A Step-Down Switching Regulator

Semtech Corporation 

POWER MANAGEMENT

Block Diagram

SC4519H

+

Is

+

SLOPE

+

ISEN

IN

40m

COMP

FB

EN

SYNC

-

EA

+

PWM

SQ

R

BST

POWER

TRANSISTOR

1V

REFERENCE UVLO

OSCILLATOR

0.7V

SLOPE

SLOPE COMP

FREQUENCY

CLK

Is

SOFT START

OL

HICCUP

FB

SW

GND

Typical Characteristic - OCP Limit

SC4519H OCP Limit vs Duty Cycle

7

6.5

6

5.5

5

4.5

4

3.5

3

2.5

2

0

20

40

60

80

100

Duty Cycle (%)

ILIM @-40C

ILIM @25C

ILIM @125C

 2007 Semtech Corp.

6

www.semtech.com

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