7

© 2005 Semtech Corp.

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POWER MANAGEMENT

SC1462

Applications Information (Cont.)

3.3μF

C2

10nF

EN

C3

1μF

3.3μF

U1

SC1462

3

1

2

46

5

C-

VIN

GND

SHDN C+

Vo

3.3μF

U2

SC2982

1

2

34

5

VIN

GND

EN

BYPASS

VOUT

3.3μF

U2

SC1453

1

2

34

5

IN

GND

EN

BYP

OUT

EN

U1

SC1462

3

1

2

46

5

C-

VIN

GND

SHDN C+

Vo

C2

10nF

3.3μF

3.3μF

C3

1μF

SC1102

1

2

13

5

8

6

4

3

12

11

14

10

7

9

VCC

PWRGD

SS/SHDN

PHASE

DRV L

DRV H

OCSET

OVP

VREF

Sense

GND

BSTH

PGND

BSTL

Power Good

SC1462

3

1

2

46

5

C-

VIN

GND

SHDNC+

Vo

5 Volts Fixed Ouput Voltage

3.3 Volts Fixed Ouput Voltage

(3.3V Input Supply) Battery Operated Synchronous Buck Converter