EV4473-L-00A – 3.5A, 36V, STEP-DOWN CONVERTER EVALUATION BOARD

EV4473-L-00A Rev. 1.0

www.MonolithicPower.com

2

3/23/2015

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

© 2015 MPS. All Rights Reserved.

EVALUATION BOARD SCHEMATIC

4.5-36V

3.3V/3.5A

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

620K

R4

1%

390pF

C4

50V

5%

31.6K

R1

1%

10K

R2

1%

22uF

C2A

1210

22uF

C2B

1210

VOUT

0.1uF

C2C

GND

GND

4.99

R3

NS

C8

0.1uF

C1D

PGOOD

6

EN

5

VCC

20

FREQ

2

VIN

FB

3

SW

BST

7

MP4470

8,19

9,10,17,18

U1

5.6uH

L1

MPQ4473

0603

0805

50V

0603

EV4473-L-00A BILL OF MATERIALS

Qty

RefDes

Value

Description

Package

Manufacturer Manufactuer_P/N

2

C1A,C1B

10μF

Ceramic Cap., 50V, X7R

1210

muRata

GRM32ER71H106KA12L

3

C1C,C2C,

C3

0.1μF

Ceramic Cap., 50V, X7R

0603

TDK

C1005X7R1C104K

1

C1D

0.1μF

Ceramic Cap., 50V, X7R

0805

muRata

GRM21BR72A104KAC4L

2

C2A,C2B

22μF

Ceramic Cap., 16V, X7R

1210

muRata

GRM32ER71C226KE79

1

C4

390pF

Ceramic Cap., 50V, C0G

0402

muRata

GRM1885C1H391JA01D

1

C5

1μF

Ceramic Cap., 25V, X7R

0402

muRata

GRM188R71C105KA12D

1

C6

33nF

Ceramic Cap., 16V, X7R

0402

muRata

GRM188R71H333KA61D

1

L1

5.6μH

Inductor, 15mOhm DCR,

10A

SMD

Coilcraft

XAL6060-562ME

1

R1

31.6k

Film Res., 1%

0402

Yageo

RC0603FR-0731K6L

1

R2

10k

Film Res., 1%

0402

Yageo

RC0603FR-0710KL

1

R3

4.99Ω

Film Res., 1%

0402

Yageo

RC0603FR-074R99L

1

R4

620k

Film Res., 1%

0402

Yageo

RC0603FR-07620KL

1

R5

499k

Film Res., 1%

0402

Yageo

RC0603FR-07499KL

1

R6

100k

Film Res., 5%

0402

Yageo

RC0603FR-07100KL

1

R7

63.4k

Film Res., 1%

0402

Yageo

RC0603FR-0763K4L

1

R9

0Ω

Film Res., 5%

0402

Yageo

RC0603FR-070RL

R8

NS

1

U1

MPQ4473 Step-Down Regulator

QFN20-

3x4

MPS

MPQ4473GL