SC4503EVB View Datasheet(PDF) - Semtech Corporation

Part Name

Description

Manufacturer

SC4503EVB

1.3MHz Step-Up Switching Regulator with 1.4A Switch

Semtech Corporation 

SC4503

POWER MANAGEMENT

Block Diagram

IN

5

SHDN/SS

4

FB

2

VOLTAGE

REFERENCE

1.25V

+

EA

-

REF NOT READY

THERMAL

SHUTDOWN

TJ > 155°C

CLK

-

PWM

+

D1

Q1

+

Z1

1V

-

Q2

R

Q

S

+

ILIM

-

I-LIMIT

OSCILLATOR

+

Σ

+

SLOPE COMP

+

ISEN

-

SW

1

Q3

RSENSE

2

GND

Figure 2. SC4503 Block Diagram

 2007 Semtech Corp.

5

www.semtech.com

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