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L6917B

Figure 23 shows the device in a high current CPU core power supply solution.

The output voltage can be adjusted with binary step from 1.100V to 1.850V following VRM 9.0 specifications.

The demo board assembled with the following part list is capable to deliver up to 50A in open air without any

kind of airflow. Peak current can reach 60A without any limitations. For higher DC current, to avoid mosfet

change, airflow or heat sink are required.

Figure 23. CPU Power Supply Schematic

Part List

R1

10k

SMD 0805

R2, R9

Not Mounted

SMD 0805

R3, R4, R5, R6

3.3k

1%

SMD 0805

R7

3.6k

1%

SMD 0805

R8

3.3k

SMD 0805

R10

82

SMD 0805

R12 to R15

2.2

SMD 0805

R16, R17, R18

0

SMD 0805

Ra

1k

SMD 0805

Rosc

1.3M

1%

SMD 0805

C1

Not Mounted

SMD 0805

PGOOD

PGND

PGNDS2

ISEN2

LGATE2

VSEN

FB

PHASE2

UGATE2

BOOT2

VCC

COMP

SGND

OSC / INH

VID0

VID1

VID2

VID3

VID4

PGNDS1

ISEN1

LGATE1

PHASE1

UGATE1

BOOT1

VCCDR

6

24

25

26

27

16

15

2

5

4

3

1

13

14

22

21

20

18

19

7

28

23

10

9

8

11

12

FBR

FBG

17

C1

R7

R8

C2

R4

R3

Q3

Q4

C3

L2

C7

R10

D3

C6

C11..C13

C14,

C23

R1

JP3

R2

S1

S0

S3

S2

S4

R5

R6

Q1

L1

Q2

C4

D4

C5

Vin

GNDin

GNDCORE

VoutCORE

PGOOD

FBG

FBR

U1

L6917B

DZ1

C8

JP2

JP1

R13

R15

R12

R14

C9,C10

R9

R18

D1

R17

R16

Q1a

Q3a

D2

R19

R20

JP5

JP4

Vcc

GNDcc

JP6

To Vcc

Rosc

Ra

Ca