SC4518HEVB View Datasheet(PDF) - Semtech Corporation

Part Name

Description

MFG CO.

SC4518HEVB

600kHz, 2A Step-Down Switching Regulator

Semtech Corporation 

POWER MANAGEMENT

Block Diagram

SC4518H

+

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

4.5

4

3.5

3

2.5

2

1.5

1

0.5

0

SC4518H OCP Limit vs Duty Cycle

ILIM @ -40C

ILIM @ 25C

ILIM @ 125C

20

40

60

80

100

Duty Cycle (%)

 2007 Semtech Corp.

6

www.semtech.com

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