Intersil ISL6539 Application Note Download Page 7 | Manualshive

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Intersil ISL6539 Application Note Download Page 7

7

ISL6539EVAL1 Schematic

U2

L1

+

U1

6

C25

C12,13,24

C8

R7

C17

C11

R8

R10

R14

R11

C26

U3

L2

+

28

C16

C14,15

C7

R6

C19

R1

VCC

VIN

C4

JP1

JP5

C5

D1

D2

R2

R3

C9

C10

R4

R5

+

C2,3

C1

VDDQ

C6

VDDQ

VTT

VREF

C23

C21

R9

C20

VCC

VI

N

DDR

BOOT1

UGATE1

PHASE1

ISEN1

LGATE1

VSEN1

OCSET2

OCSET1

SOFT1

BOOT2

UGATE2

PHASE2

ISEN2

LGATE2

VSEN2

PG2/REF

SOFT2

PGOOD

PG1

PGND1

PGND2

ISL6539

R20

R18

R19

R17

VCC

EN1

EN2

GND

24

25

22

27

26

19

15

16

17

8

21

5

4

7

2

3

10

18

11

12

1,9,20

14

13

28

J12

J14

JP3

JP4

Application Note 1278

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Summary of Contents for ISL6539

Page 1: ...the jumpers connectors and components described in the following sections JUMPER SETTINGS There are four jumpers on the board Shunting jumper JP3 pulls the EN1 pin to VCC and is used to enable Channel...

Page 2: ...uld either be turned off or the outputs should be disabled VCC Power Connection Connect the positive terminal of a laboratory power supply to the VCC post J4 Connect the return terminal of the same lo...

Page 3: ...well Evaluation Board Design General The evaluation board is built on a 2 ounce four layer printed circuit board The board is designed to support a continuous load of 5A on the VDDQ rail and a simult...

Page 4: ...tors Transient Performance Figure 7 shows both the VDDQ and VTT rails while the VDDQ rail is under transient loading FIGURE 4 START UP INTO PREBIASED OUTPUT FIGURE 5 OUTUPT RIPPLE 90 PHASE SHIFT Timeb...

Page 5: ...regulators These efficiencies were measured while the complementary regulator was disabled FIGURE 8 SOURCING TRANSIENT LOAD ON VTT FIGURE 9 SINKING TRANSIENT LOAD ON VTT Timebase 100 s DIV VDDQ AC Co...

Page 6: ...o the ISL6539 datasheet for details on this The load capacity for either rail can be increased by exchanging the MOSFETs U2 and U3 for ones with higher current handling capabilities The ISEN resistor...

Page 7: ...9 C10 R4 R5 C2 3 C1 VDDQ C6 VDDQ VTT VREF C23 C21 R9 C20 VCC VIN DDR BOOT1 UGATE1 PHASE1 ISEN1 LGATE1 VSEN1 OCSET2 OCSET1 SOFT1 BOOT2 UGATE2 PHASE2 ISEN2 LGATE2 VSEN2 PG2 REF SOFT2 PGOOD PG1 PGND1 PGN...

Page 8: ...N SEMICONDUCTOR BAT54WT1 T 1 CR1 LED SMD 4P OTHER POLARIZED RED GRN LUMEX SSL LXA3025IGC TR 1 L1 PWR CHOKE COIL SMD 5 7mm 4 6 H 25 PANASONIC ETQ P6F4R6HFA 1 L2 PWR CHOKE COIL SMD 6x6x3mm 1 5 H 20 3 2A...

Page 9: ...9 ISL6539EVAL1 Printed Circuit Board Layers ISL6539EVAL1 TOP SILK SCREEN ISL6539EVAL1 TOP LAYER Application Note 1278...

Page 10: ...10 ISL6539EVAL1 INTERNAL 1 GROUND ISL6539EVAL1 INTERNAL 2 POWER ISL6539EVAL1 Printed Circuit Board Layers Continued VTT GND VDDQ VCC Application Note 1278...

Page 11: ...ccordingly the reader is cautioned to verify that the Application Note or Technical Brief is current before proceeding For information regarding Intersil Corporation and its products see www intersil...

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