MAX1549 Evaluation Kit

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5

D1

MAX1549

U1

PGOOD1

OD1

OUT1

PGOOD1

CSL1

CSH1

BST1

DH1

N.C.

LX1

DL1

SKIP

N.C.

PGND

BST2

DH2

N.C.

DL2

PG00D2

FB2

OUT2

OD2

OD3

GND

N.C.

REFIN

REF

ILIM1

CC1

ILIM2

SKIP

G0

FSEL

G1

FBLANK

ON1

ON2

VREF

N1

1

1

4

3

2

3

2

1

2

D3

3

4

5

6

5

6

7

8

7

8

N2

VOUT1

200kHz

100kHz

400kHz

VCC

VCC

VREF

VREF

G0

JU3

JU4

OPEN

300k

Ω

1

2

3

4

L1

1.5

µH

C14

0.22

µF

C16

470pF

VOUT1

0.7V TO 1.5V AT 6A

GND

VIN

GND

20V MAX

R29

OPEN

VBIAS

+5V

R1

0.012

Ω

1%

R16

100k

Ω

1%

R11

301k

Ω

1%

R10

100k

Ω

1%

R14

66.5k

Ω

1%

R13

150k

Ω

1%

R12

487k

Ω

1%

R6

SHORT

(PC TRACE)

R5

SHORT

(PC TRACE)

R22

SHORT

(PC TRACE)

R23

SHORT

(PC TRACE)

R4

SHORT

(PC TRACE)

R3

SHORT

(PC TRACE)

C1

OPEN

C10

OPEN

R15

100k

Ω

1%

C17

100pF

C23

OPEN

C13

470pF

C22

OPEN

C20

OPEN

C2

470

µF

2.5V

C9

0.1

µF

C12

2.2

µF

C11

OPEN

C26

OPEN

C25

OPEN

C8

0.1

µF

37

38

39

40

VDD

VCC

R9

10

Ω

C15

1

µF

C4

10

µF

25V

C6

OPEN

VCC

VIN

C28

10

µF

6.3V

VOUT1

R7

100k

Ω

4

3

1

2

6

5

VREF

VCC

R18

100k

Ω

1%

R17

100k

Ω

1%

VREF

VREF

R24

OPEN

C18

100pF

R27

100k

Ω

R26

OPEN

R25

OPEN

VCC

G1

ON1

JU5

R28

100k

Ω

C24

OPEN

7

8

9

10

11

VCC

JU1

1

2

3

12

VCC

JU6

1

2

3

VCC

VDD

ON2

VCC

JU2

1

2

3

13

34

33

35

36

29

32

31

30

27

28

25

26

23

22

BST1

VCC

VOUT2

R20

OPEN

R21

0

Ω

R19

OPEN

VCC

R8

100k

Ω

BST1

N4

N3

D2

LX2

CSH2

CSL2

1

1

4

3

2

3

2

4

5

6

5

6

7

8

7

8

L2

4.7

µH

VOUT2

PG00D2

R32

OPEN

R2

0.015

Ω

1%

C3

220

µF

4V

C21

OPEN

C19

OPEN

C5

10

µF

25V

C7

OPEN

VIN

C27

10

µF

6.3V

VOUT2

VOUT2

19

21

24

14

15

18

16

17

20

Figure 1. MAX1549 EV Kit Schematic