PROGRAMMABLE SYNCHRONOUS DC/DC

CONVERTER, DUAL LOW DROPOUT

REGULATOR CONTROLLER

© 1999 SEMTECH CORP.

PRELIMINARY - January 6, 1999

652 MITCHELL ROAD NEWBURY PARK CA 91320

SC1185

SC1185A

6

MATERIALS LIST

Qty. Reference

Part/Description

Vendor

Notes

4

C1,C5,C13,C18 0.1µF Ceramic

Various

6

C2,C3,C14-C17 1500µF/6.3V

SANYO

MV-GX or equiv. Low ESR

1

C9

1000µF

2

C11,C21

330µF/6.3V

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

1

Q3

IRLML2803

IR

.25

Ω 30V SOT23 (or equavilent)

1

Q4

IRFZ14S

IR

Or equivalent

1R4

5m

Ω

IRC

OAR-1 Series

1R5

2.32k

Ω, 1%, 1/8W Various

1R6

1k

Ω, 1%, 1/8W

Various

1R1

10

Ω, 5%, 1/8W

Various

1

U1

SC1185CSW

SEMTECH