SC1153

PROGRAMMABLE SYNCHRONOUS DC/DC

CONTROLLER FOR ADVANCED PROCESSORS

© 2000 SEMTECH CORP.

652 MITCHELL ROAD NEWBURY PARK CA 91320

PRELIMINARY - October 3, 2000

4

MATERIALS LIST

Quantity

Reference

Part/Description

Vendor

Notes

4

C1,C11-C13 0.1µF Ceramic

Various

9

C2-C10

1000µF/6.3V

SANYO

MV-GX or equiv. Low ESR

1

D1

1N5817

Various

1

L1

4µH

8 Turns 16AWG on MICROMETALS T50-52D core

2

Q1, Q2

See notes

See notes

FET selection requires trade-off between efficiency

and cost. Absolute maximum R

1R1

5m

Ω

IRC

OAR-1 Series

1R2

10k

Ω, 5%, 1/8W

Various

1R3

2.32k

Ω, 1%, 1/8W Various

1R4

1k

Ω, 1%, 1/8W

Various

1R5

10

Ω, 5%, 1/8W

Various

1

U1

SC1153CS

SEMTECH

APPLICATION CIRCUIT

C12

0.1uF

C1

0.1uF

C5

1000uF

+

C6

1000uF

+

C7

1000uF

+

C8

1000uF

+

C4

1000uF

+

C3

1000uF

+

C2

1000uF

+

L1

4 uH

R2

10k

C9

1000uF

+

C10

1000uF

+

R1

5mOhm

R5

10

C13

0.1uF

D1

1N5817

Q1

Q2

C11

0.1uF

R4

1.00k

R3

2.32k

U1

SC1153CS

GND

1

VCC

2

OVP

3

PWRGOOD

4

CS-

5

CS+

6

PGNDH

7

DH

8

BSTH

13

SHUTDOWN

14

15

VID4

16

VID3

17

VID2

18

VID1

19

VID0

20

DL

11

PGNDL

10

BSTL

12

NC

9

5V IN

12V IN

OVP

VID0

VID1

VID2

VID3

VID4

SHUTDOWN

PWRGOOD

VCCP

VOSENSE

Figure 1.

Pentium