VRM9.0 PROGRAMMABLE, MULTI-PHASE,

HIGH PERFORMANCE PWM CONTROLLER

SC1146

© 2000 SEMTECH CORP.

652 MITCHELL ROAD NEWBURY PARK CA 91320

July 25, 2000

7

The SC1146 is patent pending

BILL OF MATERIAL

Item Qty

Reference

Value

Manufacturer

1

9

C2,C4,C11,C19,C20,C28,C29,C37,C39

1u,10V

X7R, AVX (818)883-7606

2

1

C3

10uF, 6.3V

Al. Elec.,Murata

3

9

C5,C12,C14,C17,C18,C21,C22,C26,C27

22u, 10V

Murata (512)250-5082

PN #GRM235Y5V226Z010

4

5

C6,C7,C15,C24,C32

1uF, 16V

Murata,Al. Elec.

5

1

C8

330uF, 16V

Nichicon

6

3

C16,C25,C33

10u, 16V

Murata

7

1

C40

.01u

Murata

8

1

C42

.022

any

9

2

C45,C49

.01

Murata,X7R

10

1

C46

.001

Murata

11

4

C50,C51,C52,C53

1nF

any

12

1

C54

1000uF

Murata,Al. Elec.

13

8

D1,D2,D3,D4,

D5,D7,D9,D11

SS12(1A)

SS32 (3A)

General Instruments

General Instruments

14

1

J1

INPUT

15

4

L1,L2,L3,L4

.6uh,12A

Falco (305)662-7276

PN #T02508

16

4

Q1,Q4,Q7,Q10

IR7811

Int. Rectifier

17

4

Q3,Q6,Q9,Q12

IR3101D2

(Alter.)FDB7030BL

Int. Rectifier

Fairchild Semiconductors

18

1

R1

10

Dale,any

19

9

R2,R10,C13,R14,R17,C23,R33,C34,C43

0

any

20

4

R4,R12,R16,R23

1.5 (or zero)

any

21

4

R5,R6,R7,R38

10K

any

22

4

R8,R9,R11,R13

22

any

23

1

R18

SEL

any

23

1

R19

100

any

24

1

R20

2.2k

any

25

1

R22

15k

any

26

1

R24

300k

any

27

5

R25,R40,R41,R42,R43

2.2

any

28

1

R26

open

any

29

4

R27,R28,R29,R30

51, 1/4W, 1206, 10K Dale

30

6

R31,R32,R34,R35,R36,R37

TBD(used at light load,

contact factory)

any

31

1

S1

Vout/Clk switch C&K

(800)cal-swch

32

4

U1,U3,U4,U5

SC1405B/SC1405TS Semtech (805)498-2111

33

1

U2

SC1146CSW

Semtech (805)498-2111

34

1

U6

LM358

any

Unless otherwise noted, all resistors are 1/10W, 5%, 0805 and all capacitors are 20%, 50v, 0805.