5

© 2006 Semtech Corp.

www.semtech.com

POWER MANAGEMENT

SC2647

Pin Configurations

Pin Descriptions

Ordering Information

(24-Pin SOIC/TSSOP)

Top View

12

11

6

5

4

3

1

2

10

9

8

7

13

14

19

20

21

22

24

23

15

16

17

18

VID1

VID0

OUT1

OUT2

OUT3

OUT4

OS4

OUTSEN

VID5

PGOOD

OSCREF

AGND

VID2

VID3

GSENSE

ERROUT

BGOUT

OS1

OS3

OS2

VID4

VCC

DACSTEP

FB

Note:

(1) Only available in tape and reel packaging. A reel contains 1000 devices

for the SOIC-24 and 2500 devices for the TSSOP-24 package.

(2) Specify SOIC-24 or TSSOP-24 package.

(3) Lead free product. This product is fully WEEE and RoHS compliant.

r

e

b

m

u

N

t

r

a

Pe

g

a

k

c

a

PT

(

e

g

n

a

R

.

p

m

e

T

R

T

W

S

7

4

6

2

C

S

)

1

(

4

2

-

C

I

O

S5

2

1

o

t

0

R

T

S

T

7

4

6

2

C

S

)

1

(

4

2

-

P

O

S

S

T5

2

1

o

t

0

T

R

T

S

T

7

4

6

2

C

S

)

3

,

1

(

4

2

-

P

O

S

S

T5

2

1

o

t

0

B

V

E

7

4

6

2

C

S

)

2

(

d

r

a

o

B

n

o

i

t

a

u

l

a

v

E

Pin#

P in N a me

P in Func tion

1

OS 3

C urrent s e ns e i nput.

2

OS 2

C urrent s e ns e i nput.C o nnec t to O UTS E N fo r 2 p has e op e ra ti o n.

3

OS 1

C urrent s e ns e i nput.

4

B GO UT

B G re fe re nc e p i n.C o nne c t s o ft start cap fro m thi s pin to A GND .

5

E RROUT

E rro r-amp li fier outp ut.C onne ct c o mpe ns a ti on ne two rk to A GND .

6

G S E NS E

Remote sens e fo r G ND .

7

F B

F eed back pin.Ro ute F B and GE NS E a s differe nti al p a ir to C P U.

8

D A C S TE P

V ID s tep spee d.C o nnect a c a p from thi s pin to A GND to fi lte r D A C outp ut.

9

V C C

P o we r s up p ly fo r c hi p .

1 0 ~1 4

V ID 4 : 0

V ID M SB to V ID L SB.

1 5

V ID 5

12.5m V b i t fo r V RD 10.x. P ull it up to >2 V and pro g ra m the si nk c urrent to

s e le c tV RM9 or K 8 V ID ta ble.

1 6

P G OOD

P o we r good , O pen c o lle c tor o utp ut.

1 7

O S C RE F

Osc i lla to r fre q ue ncy se tti ng .C o nne ct a re si sto r to A GND .

1 8

A GND

C lea n ground fo r ana log si g nals.

1 9

OUT1

P W M outp ut1.

20

OUT2

P W M outp ut2.

21

OUT3

P W M outp ut3.

22

OUT4

P W M outp ut4. C o nnect to V C C fo r 3 p hase op era tion.

23

OUTS E N

D i re ct o utp ut s e ns e.

24

OS 4

C urre nt s e ns e inp ut. C o nne c t to O UTS E N fo r 2 or 3 phas e ope ra ti o n.