3

© 2005 Semtech Corp.

www.semtech.com

SC2603

POWER MANAGEMENT

Pin Configuration

Ordering Information

Pin Descriptions

Top View

s

r

e

b

m

u

N

t

r

a

P

e

g

a

k

c

a

P

T

R

T

K

S

3

0

6

2

C

S

1

(

(

)

)

2

6

-

3

2

T

O

S

B

V

E

3

0

6

2

C

S

Note:

(1) Only available in tape and reel packaging. A reel

contains 3000 devices.

(2) Lead free product. This product is fully WEEE and

RoHS compliant

#

n

i

P

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m

a

N

n

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P

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o

it

c

n

u

F

n

i

P

1

B

F

.)

-

(

t

u

p

n

i

r

e

if

il

p

m

a

r

o

r

r

E

2

D

N

G

.

d

n

u

o

r

g

e

c

i

v

e

D

3

S

S

/

N

E

.

n

i

P

tr

a

t

S

tf

o

S

/

e

l

b

a

n

E

4

e

t

a

G

.t

u

p

t

u

o

r

e

v

ir

d

e

t

a

G

5

N

I

V

.

e

g

a

tl

o

V

t

u

p

n

I

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c

i

v

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D

6

S

C

.

t

u

p

n

I

e

s

n

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S

t

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r

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u

C

Block Diagram

2

1

3

FB

GND

EN/SS

4

6

CS

5

VIN

GATE

SOT23-6

VIN

FB

Gate

CS

UVLO

GND

PWM

EN/SS

70mV

Current

Limit

VIN

UV

S

Q

R

OSCILLATOR

OSCILLATOR

1.25V

REF

1.25V

REF

25K