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HIP6021 DC-DC Converter Application Circuit

Figure 12 shows an application circuit of a power supply for a

microprocessor computer system. The power supply provides

the microprocessor core voltage (VOUT1), the AGP bus

voltage (VOUT2), the GTL bus voltage (VOUT3), and the

memory voltage (VOUT4) from +3.3V, +5VDC, and +12VDC.

For detailed information on the circuit, including a Bill-of-

Materials and circuit board description, see Application Note

AN9836. Also see Intersil’s web page (http://www.intersil.com)

or Intersil AnswerFAX (407-724-7800) Document No. 99836 for

the latest information.

VID1

VID2

VID3

VID4

SS

GND

VCC

VID0

PGND

VSEN1

PGOOD

LGATE

UGATE

OCSET

PHASE

Q1,2

POWERGOOD

FB

COMP

VSEN2

DRIVE2

Q3

DRIVE3

VSEN3

DRIVE4

C25,26

C23,24

C12-19

HIP6021

Q4

L2

+

+

+

+

+

C7

L1

C1-6

C9

C8

R1

R2

R3

C20

C21

C22

C27

2x1000

µF

2x1000

µF

C10,11

2x1000

µF

1

µH

6x1000

µF

1

µF

1

µF

1000pF

8x1000

µF

0.1

µF

4.2

µH

0.22

µF

10pF

2.7nF

10.2K

1.62k

GND

(3.3V or 1.5V)

(1.5V)

(1.8V)

VSEN4

TYPEDET

SELECT

R5

499K

R4

150K

SD

FIX

1.0K

Q5

U1

1

2

3

4

5

6

7

8

9

10

11

12

13

16

15

14

17

18

19

20

21

22

23

24

25

26

27

28

FAULT/RT

VAUX

HUF76107D3S

HUF76107D3S

HUF76121D3S

2xHUF76143S3S

(1.3V-3.5V)

FIGURE 12. POWER SUPPLY APPLICATION CIRCUIT FOR A MICROPROCESSOR COMPUTER SYSTEM

HIP6021