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ADP3414

Dual Bootstrapped MOSFET Driver

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ADP3414

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 ADP3414 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.

Typical Application Circuits

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

bined with the ADP3160 to form a total power conversion

solution for VCC(CORE) generation in a high current Intel CPU

computer. Figure 4 gives a similar application circuit for a

45 A AMD processor.

VIN

12V

VINRTN

270␮F ؋ 4

OS–CON 16V

C12 C13 C14 C15

R6

10⍀

C4

4.7␮F

U1

ADP3160

FROM

CPU

RA

34.0k⍀

1 VID4 VCC 16

2 VID3 REF 15

3 VID2 CS– 14

4 VID1 PWM1 13

COC

1.4nF

RZ

1.1k⍀

5 VID0 PWM2 12

6 COMP CS+ 11

7 FB PWRGND 10

8 CT

GND 9

RB

11.5k⍀

C1

150pF

C2

100pF

R1

1k⍀

R7

20⍀

C23 C24

10␮F 10␮F

R4

4m⍀

C26

4.7␮F

D1

C9

MBR052LTI

1␮F

C21

15nF

R5

2.4k⍀

Z1

ZMM5236BCT

Q5

2N3904

U2

ADP3414

1 BST

2 IN

DRVH 8

SW 7

3 NC PGND 6

4 VCC DRVL 5

C5

C22

1␮F

1nF

D2

C10

MBR052LTI

1␮F

U3

ADP3414

1 BST DRVH 8

2 IN

SW 7

3 NC PGND 6

4 VCC DRVL 5

C6

1␮F

NC = NO CONNECT

Q1

FDB7030L L1

600nH

Q2

FDB8030L

1200␮F ؋ 8

OS–CON 2.5V

11m⍀ ESR (EACH)

VCC (CORE)

1.1V – 1.85V

53.4A

++++ ++++

C11 C16 C17 C18 C19 C20 C27 C28

VCC (CORE)

RTN

Q3

FDB7030L

L2

600nH

Q4

FDB8030L

Figure 3. 53.4 A Intel CPU Supply Circuit

REV. A

Rev. 3 | Page 7 of 9 | www.onsemi.com

–7–

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