ADP3154 datasheet(4/12 Pages) AD

Part #	ADP3154

Description	5-Bit Programmable Dual Power Supply Controller for Pentium III Processors

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Manufacturer	AD [Analog Devices]

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REV. A

ADP3154

–4–

P

SYSTEM

R1

105k

R2

18.2k

CT

200pF

22 F

1 F

22

IRL3803

10BQ015

1 F

ESR = 25m

EACH

2200 F

3

(25V)

L2

1 H

L1

1.7 H

RSENSE

5m

ESR = 25m

EACH

2200 F

6

(25V)

VO

2V

0-19A

RTN

220

100k

VCC +5V

+5V RTN

+12V RTN

CCOMP

3600pF

ADP3154

NC = NO CONNECT

SENSE–

VLDO

NC

VID2

VID3

VID4

FB

SD

AGND

VID1

SENSE+

CT

CMP

PGND

NC

DRIVE1

PWRGD

VCC

DRIVE2

VID0

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

1000 F

IRLR2703

1nF

RPROG

35k

RTN

220

VIN +12V

2k

470pF

2N2222

1.1

R3

20k

VO2

+3.3V

0.5A

Figure 2. Typical VRM8.2/8.3/8.4 Compliant Core DC/DC Converter Circuit

gm

NONOVERLAP

DRIVE

IN

CROWBAR

14

15

SD

VCC DRIVE1 DRIVE2 PGND

VREF +15%

5

AGND

PWRGD

SENSE+

DELAY

VREF +5%

VREF –5%

SENSE–

2R

ADP3154

CMPI

DAC

CMP

1.20V

VID0

1

VID1

2

VID2

3

VID3

4

VID4

VREF

VT1

CMPT

VT2

CT

SENSE–

6

REFERENCE

R

10

11

S

R

Q

OFF-TIME

CONTROL

VIN

13

12

9

VLDO

FB

OFF

Figure 3. Functional Block Diagram

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