ISL6444 Просмотр технического описания (PDF) - Intersil

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ISL6444

Dual PWM Controller with DDR Memory Option for Gateway Applications

Intersil 

ISL6444

C1, C2

10μF

+5.6-24VIN

GND

VDDQ

+2.5V

(6A)

R3

32k4

R4

18k2

R5

18k2

R6

18k2

CR1

Q1

1/2 IRF7313

C6

0.1μF

L1

4.7μH

+

C8

330μF

Q2

2/2 IRF7313

C10

0.01μF

+5.0Vcc

C3

0.01μF

SOFT1

VIN

12 14

VCC

28 17

SOFT2

CR2

+

C5

10μF

BOOT1

6

23 BOOT2

UGATE1

PHASE1

R1 ISEN1

680

LGATE1

PGND1

VSEN1

VOUT1

EN1

PG1

R7 OCSET1

5

24

4

25

7

22

ISL6444

2

27

3

26

10

19

9

20

8

21

15

16

11

1

18

13

UGATE2

PHASE2

ISEN2 R2

499

LGATE2

PGND2

VSEN2

VOUT2

EN2

EN1

PG2/REF

OCSET2

Q3

1/2 IRF7313

C7

0.1μF

L2

1.5μH

VTT

+1.25V

(3A)

C9

+

Q4

330μF

2/2 IRF7313

VREF

1.25V

(10mA)

GND

DDR

VCC

FIGURE 12. APPLICATION CIRCUIT FOR COMPLETE DDR MEMORY POWER SOLUTION WITH ONE-STEP CONVERSION

17

FN9069.3

April 12, 2007

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