IRU3037 / IRU3037A

15

Rev. 2.8

03/10/03

www.irf.com

Figure 19 - Typical application of IRU3037 or IRU3037A in an on-board DC-DC converter providing the Core,

GTL+, and Clock supplies for the Pentium II microprocessor.

TYPICAL APPLICATION

Dual Supply, 5V Bus and 12V Bias Input

IRU3037

U1

Vcc

Vc

HDrv

LDrv

Fb

Gnd

Comp

SS/SD

Vcc

Vc

HDrv

LDrv

Fb

Gnd

Comp

12V

IRU1206-18

2.5V/2A

1.8V/1A

R3

1K

1%

C3

47uF

C1

47uF

L1

1uH

C2

10TPB100M, 100uF,

55m

Q1

1/2 of IRF7752

L2

CTX5-2P, 3.5uH @ 2.5A

Q2

1/2 of IRF7752

R1

1K, 1%

C1

1uF

C4

1uF

C7

0.1uF

C8

2200pF

R2

14K

C10

1uF

C11

1uF

C13

0.1uF

C14

2200pF

R5

14K

R6

1K, 1%

R4

1.65K, 1%

Q4

1/2 of IRF7752

L3

CTX5-1P, 3.4uH @ 2A

Q3

1/2 of IRF7752

C9

10TPB100M, 100uF,

55m

3.3V/1.8A

L2

CTX5-2P, 3.5uH @ 2.5A

CTX10-5P, 5.7uH @ 2.5A

C6

6TPB150M, 150uF, 55m

V (Qty 2)

6TPB150M, 150uF, 55m

V (Qty 1)

C6

6TPB150M, 150uF, 55m

V

C12

6TPB150M, 150uF, 55m

V

5V

IRU3037

U2

SS/SD