REV. A

ADP3416

–7–

Printed Circuit Board Layout Considerations

Use the following general guidelines when designing printed

circuit boards:

1. Trace out the high current paths and use short, wide traces to

make these connections.

2. Connect the PGND Pin of the ADP3416 as close as possible

to the source of the lower MOSFET.

3. The VCC bypass capacitor should be located as close as

possible to VCC and PGND Pins.

IN

VCC

BST

DRVH

SW

DRVL

PGND

U2

ADP3416

NC

7

6

5

1

2

3

4

8

VID4

VID3

VID2

VID1

VID0

SHARE

COMP

GND

FB

CT

REF

PWM1

PWM2

PWM3

PC

PGND

CS–

CS+

PWRGD

3

1

4

5

18

17

16

2

20

19

6

10

7

8

9

11

14

13

12

15

ADP3165

1.2nF

IN

VCC

BST

DRVH

SW

DRVL

PGND

U3

ADP3416

NC

7

6

5

1

2

3

4

8

L3

600nH

Q4

FDB7030L

C16

15nF

R9

2

C15

4.7 F

D2

MBR052LTI

C14

100nF

Q8

FDB8030L

IN

VCC

BST

DRVH

SW

DRVL

PGND

U4

ADP3416

NC

7

6

5

1

2

3

4

8

L2

600nH

Q3

FDB7030L

C13

15nF

R8

2

L4

600nH

Q5

FDB7030L

C19

15nF

R10

2

+

+

R5

20

C6

15nF

C7

1nF

10.0k

C9

150pF

C10

100pF

1k

R3

32.4k

U1

R4

10

C4

4.7 F

+

+

+

C1

C2

C3

L1

1 H

270 F/16V

3

OS-CON SP SERIES

18m

ESR(EACH)

C12

4.7 F

R6

2k

R7

5m

C11

100nF

Z1

ZMM5263BCT

Q2

FZ649TA

D1

MBR052LTI

D3

MBR052LTI

C18

4.7 F

C17

100nF

2200 F/6.3V

9

RUBYCON MBZ SERIES

12m ESR(EACH)

C20

C29

1.1V – 1.85V

65A

Q7

FDB8030L

Q9

FDB8030L

Q1

2N7000

10k

R2

OUTEN

10 F

27

MLCC

U5

1/6 7404

10 F

2

MLCC

FROM

CPU

NC = NO CONNECT

Figure 3. 65 A Intel Pentium 4 CPU, VR Down Guideline Design

Typical Application Circuits

The circuit in Figure 3 shows how two drivers can be com-

bined with the ADP3165 to form a total power conversion

computer.