SC1155

PROGRAMMABLE SYNCHRONOUS

DC/DC HYSTERETIC CONTROLLER

WITH VRM 9.0 VID RANGE

© 2000 SEMTECH CORP.

PRELIMINARY - August 7, 2000

12

NOTE:

(1) If the VID bits are set to 11111, then the high-side and the low-side driver outputs will be set low, turning both

MOSFETs off, and the controller will be set to a low-Iq state.

OUTPUT VOLTAGE TABLE

0 = VSS; 1 = OPEN

VID4

VID3

VID2

VID1

VID0

VDC

(V)

1

1

1

1

1

Output Off

1

1

1101.1

1

1

1

0

1

1.125

1

1

1

0

0

1.15

1

1

0

1

1

1.175

1

1

0101.2

1

1

0

0

1

1.225

1

1

0

0

0

1.250

1

0

1

1

1

1.275

1

0

1101.3

1

0

1

0

1

1.325

1

0

1

0

0

1.35

1

0

0

1

1

1.375

1

0

0101.4

1

0

0

0

1

1.425

1

0

0

0

0

1.45

0

1

1

1

1

1.475

0

1

1101.5

0

1

1

0

1

1.525

0

1

1

0

0

1.55

0

1

0

1

1

1.575

0

1

0101.6

0

1

0

0

1

1.625

0

1

0

0

0

1.65

0

0

1

1

1

1.675

0

0

1101.7

0

0

1

0

1

1.725

0

0

1

0

0

1.75

0

0

0

1

1

1.775

0

0

0101.8

0

0

0

0

1

1.825

0

0

0

0

0

1.85