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ADP3152

5-Bit Programmable Synchronous Switching Regulator Controller for Pentium® II Processor

Analog Devices 

ADP3152

␮P

SYSTEM

100k⍀

ADP3152

1

VID1

16

VID0

2

VID2

15

PGND

3

VID3

14

DRIVE1

4

VID4

13

DRIVE2

5

AGND

VCC 12

6

SD

PWRGD 11

7

SENSE–

10

CMP

8

SENSE+

9

CT

CT

150pF

1nF

22⍀

+

22␮F

1␮F

IRL3103

IRL3103

3 ؋2700␮F/10V

L2

1.7␮H

+ +++

1␮F

VCC + 12V

VIN + 5V

+5V RTN

+12V RTN

L1

2.5␮H

RSENSE

6.7m⍀

10BQ015

2700␮F ؋ 6 (10V)

++++++

VO

1.8V–3.5V

0-14A

R1

150k⍀

R2

39k⍀

2nF

CCOMP

RTN

220⍀

220⍀

Figure 2. Typical Application for Pentium II

SD 6

VCC DRIVE1 DRIVE2 PGND AGND PWRGD

12

14

13

15

5

11

SENSE+ SENSE–

8

7

VREF + 15%

DELAY

ADP3152

NONOVERLAP

DRIVE

CROWBAR

IN

S

Q

R

VT2

CMPT

VREF + 5% VREF – 5%

CMPI

VT1

gm

REFERENCE

2R

1.20V

16 VID0

1 VID1

VREF

R

2 VID2

3 VID3

OFF-TIME

CONTROL

SENSE–

DAC

4 VID4

9

10

CT

CMP

Figure 3. Functional Block Diagram

–4–

REV. 0

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