EVQ4470-L-00A

– 5A, 36V, STEP-DOWN CONVERTER EVALUATION BOARD

EVQ4470-L-00A Rev. 1.0

www.MonolithicPower.com

2

5/21/2013

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2013 MPS. All Rights Reserved.

EVALUATION BOARD SCHEMATIC

4.5-36V

3.3V/5A

NS

R8

0

R9

VIN

10uF

C1A

50V

1210

10uF

C1B

50V

1210

0.1uF

C1C

50V

63.4K

R7

1%

1uF

C5

16V

100K

R6

499K

R5

1%

EN

PGOOD

33nF

C6

50V

1%

0.1uF

C3

NS

D1

10uH

L1

620K

R4

1%

390pF

C4

50V

5%

31.6K

R1

1%

10K

R2

1%

22uF

C2A

1210

22uF

C2B

NS

C2D

1210

VOUT

0.1uF

C2C

GND

GND

4.99

R3

NS

C8

NS

C7

D2

PGOOD

6

EN

5

VCC

20

FREQ

2

VIN

FB

3

SW

BST

7

MPQ4470

8,19

9,10,17,18

U1

NS

C1D

EVQ4470-L-00A BILL OF MATERIALS

Qty

RefDes

Value

Description

Package

Manufacturer

Manufactuer_P/N

2

C1A,C1B

10

μF

Ceramic Cap., 50V, X7R

1210

muRata

GRM32ER71H106KA12L

3

C1C,C2C,

C3

0.1

μF

Ceramic Cap., 50V, X7R

0402

TDK

C1005X7R1C104K

2

C2A,C2B

22

μF

Ceramic Cap., 16V, X7R

1210

muRata

GRM32ER71C226KE79

1

C4

390pF

Ceramic Cap., 50V, C0G

0402

Yageo

CC0402KRX7R9BB391

1

C5

1

μF

Ceramic Cap., 25V, X7R

0402

muRata

GRM155R61E105KA12

1

C6

33nF

Ceramic Cap., 16V, X7R

0402

Yageo

CC0402KRX7R7BB333

4

C1D,C2D,

C7,C8

NS

2

D1,D2

NS

1

L1

10

μH

Inductor, 21mOhm, 10.5A

SMD

Wurth

7447709100

1

R1

31.6k

Film Res., 1%

0402

Yageo

RC0402FR-0731K6L

1

R2

10k

Film Res., 1%

0402

Yageo

RC0402FR-0710KL

1

R3

4.99Ω

Film Res., 1%

0402

Yageo

RC0402FR-074R99L

1

R4

620k

Film Res., 1%

0402

Yageo

RC0402FR-07620KL

1

R5

499k

Film Res., 1%

0402

Any

0402-F4993TCE

1

R6

100k

Film Res., 5%

0402

Any

0402-J0104TCE

1

R7

63.4k

Film Res., 1%

0402

Yageo

RC0402FR-0763K4L

1

R9

0Ω

Film Res., 5%

0402

Any

0402-J0000TCE

1

R8

NS

1

U1

MPQ4470

Step-Down Regulator

QFN20-

3x4

MPS

MPQ4470GL