EV28115DQ-00B – 4A, 5.5V, SYNCHRONOUS STEP-DOWN REGULATOR EV BOARD

EV28115DQ-00B 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

22

µF

16V

C2

22

µF

16V

C3

100nF

16V

D2

B0540W-7-F

R2

10k

Ω

R1

12.4k

Ω

R7

NS

C5

NS

R5

100k

Ω

R9

0

Ω

R8

200k

Ω

R6

0

Ω

R3

NS

R4

100k

Ω

L1

0.95

µH

C6

22

µF

6.3V

C4

22

µF

6.3V

GND

GND

VIN

GND

VOUT

EN/SYNC

GND

2, 9, 11

4, 7

5

10

6

1

3, 8

FB

SW

MP28115

ON/OFF

POK/VCC

C8

NS

POK

IN

BST

EV28115DQ–00B BILL OF MATERIALS

Qty

Ref

Value

Description

Package

Manufacturer

Manufacturer P/N

2

C1, C2

22

Ceramic Cap., 16V, X7R

1210

Murata

GRM32ER71C226K

1

C3

100nF

Ceramic Cap., 16V, X7R

0603

Murata

GRM188R71C104K

2

C4, C6

22

Ceramic Cap., 6.3V, X7R

1210

Murata

GRM32ER70J226K

3

C5, C7,

C8

NS

Not Stuffed

1

R1

12.4kΩ

Film Resistor, 1%

0603

Yageo

RC0603FR-0712K4L

1

R2

10 kΩ

Film Resistor, 1%

0603

Yageo

RC0603FR-0710K0L

2

R3, R7

NS

Not Stuffed

2

R4, R5

100 kΩ

Film Resistor, 5%

0603

Yageo

RC0603FR-07100KL

2

R6, R9

0Ω

Film Resistor, 5%

0603

Yageo

RC0603JR-0700R0L

1

R8

200 kΩ

Film Resistor, 5%

0603

Yageo

RC0603JR-07200KL

2

D1, D3

NS

Not Stuffed

1

D2

0.5A,

40V

Schottky Diode

SOD-123

Diodes Inc

B0540W-7-F

1

L1

0.95

Inductor, DCR=7.4mΩ

SMD

Wurth

Electronics

744310095

1

U1

Step-Down Regulator

QFN10

MPS

MP28115DQ