EV28115DQ-01C – 4A, 6V, SYNCHRONOUS STEP-DOWN REGULATOR EV BOARD

EV28115DQ-01C Rev. 1.0

www.MonolithicPower.com

2

10/12/2009

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2009 MPS. All Rights Reserved.

EVALUATION BOARD SCHEMATIC

D3

NS

D1

NS

C7

NS

C1

25V

D2

B0540W-7-F

R7

NS

C5

NS

R3

NS

GND

GND

VIN

GND

VOUT

EN/SYNC

GND

2, 9, 11

4, 7

5

10

6

1

3, 8

FB

SW

MP28115DQ

ON/OFF

POK/VCC

C8

NS

POK

IN

BST

C9

NS

EV28115DQ–01C BILL OF MATERIALS

Qty

Ref

Value

Description

Package

Manufacturer

Manufacturer P/N

2

C1, C2

22µF

Ceramic

Cap.,

16V,

X7R

SMC1210

Murata

GRM32ER71C226K

1

C3

0.1µF

Ceramic

Cap.,

16V,

X7R

SMC0603

Murata

GRM188R71C104K

2

C4, C6

22µF

Ceramic Cap., 6.3V,

X7R

SMC1210

Murata

GRM32ER70J226K

3

C5, C7,

C8,C9

NS

Not Stuffed

SMC0603

1

R1

400kΩ

Film Resistor, 1%

SMR0603

Yageo

RC0603FR-07400KL

1

R2

316kΩ

Film Resistor, 1%

SMR0603

Yageo

RC0603FR-07316KL

2

R4, R5

100kΩ

Film Resistor, 5%

SMR0603

Yageo

RC0603JR-07100KL

2

R3, R7

NS

Do Not Stuff

SMR0603

4

R6, R8,

R9, R10

0Ω

Film Resistor, 5%

SMR0603

Yageo

RC0603JR-0700R0L

2

D1, D3

NS

Not Stuffed

SOD-323

1

D2

0.5A, 40V

Schottky Diode

SOD-123

Diodes Inc

B0540W-7-F

1

L1

0.95µH

Inductor,

SML

7x7x3mm

Wurth

Electronics

WE-744310095

1

U1

Step-Down Regulator

QFN10

Monolithic

Power Systems

Inc.

MP28115DQ