EV2309DS-00A – 1A, 23V, 340KHz SYNCHRONOUS STEP-DOWN EV BOARD

EV2309DS-00A Rev. 1.3

www.MonolithicPower.com

2

9/29/2005

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2005 MPS. All Rights Reserved.

TM

EVALUATION BOARD SCHEMATIC

VIN

EN

SS

VOUT

3.3V / 1A

GND

C7

NS

U1

C3

3.3nF

D1

B130LAW

(optional)

C1

10nF

MP2309

BS

21

3

5

6

4

8

7

IN

FB

SW

SS

GND

COMP

EN

C4

NS

R5

NS

EV2309_S01

C8

NS

GND

C5

NS

EV2309DS-00A BILL OF MATERIALS

Qty

Ref

Value

Description

Package

Manufacturer:

Manufacturer P/N

Distributor:

Distributor P/N

1

C1

10nF

Ceramic Capacitor, 50V,

X7R

0805

Panasonic:

ECJ-2VB1H223K

Digikey:

PCC223BGCT-ND

1

C2

10µF

Ceramic Capacitor, 25V,

X7R

1210

TDK:

C3225X7R1E106M

Digikey:

445-1434-1-ND

1

C3

3.3nF

Ceramic Capacitor, 50V,

X7R

0805

Panasonic:

ECJ-2VB1H332K

Digikey:

PCC332BNCT-ND

4

C4, C5,

C7, C8

NS

Not Stuffed

1

C6

0.1µF

Ceramic Capacitor, 50V,

X7R

0805

TDK:

C2012X7R1H104K

Digikey:

445-1349-1-ND

1

C9

22µF

Ceramic Capacitor, 16V,

X5R

1210

TDK:

C3225X5R1C226M

Digikey:

445-1436-1-ND

1

D1

Diode Schottky, 30V, 1A

SOD-123

Diodes Inc.:

B130LAW

Digikey:

B130LAWDICT-ND

1

L1

10µH

Inductor, 1.5A

SMD

Sumida:

CDRH6D26NP-100NB

1

R1

26.1kΩ Resistor, 1%

0805

Panasonic:

ERJ-6ENF2612V

Digikey:

P26.1KCCT-ND

1

R2

7.5kΩ

Resistor, 5%

0805

Panasonic:

ERJ-6GEYJ752V

Digikey:

P7.5KACT-ND

1

R3

10kΩ

Resistor, 1%

0805

Panasonic:

ERJ-6ENF1002V

Digikey:

P10.0KCCT-ND

1

R4

100kΩ Resistor, 5%

0805

Panasonic:

ERJ-6GEYJ104V

Digikey:

P100KACT-ND

1

R5

NS

Not Stuffed

1

U1

Step-Down Converter, 1A,

340KHz

SO8

MPS:

MP2309DS