EV0015

3A MP1583

Step Down Converter

EV0015 Rev 1.0_11/21/02

www.monolithicpower.com

3

Monolithic Power Systems

Table 1: EV0015 Evaluation Board Schematic Bill of Materials

Parts

Component

Package

QTY

ICs

MP1583DS

U1

SOIC8

1

Capacitors

10nF, Ceramic

C1, C3

0603

2

10

µF, 35V, Ceramic

C2

1210

1

22

µF, 10V, Ceramic

C5

1210

1

100pF, 50V, Ceramic

C4

0603

1

Not Stuffed

C6, C7

0603

2

Resistors

10.5K

Ω, 1%

R1

0603

1

10K

Ω, 1%

R2, R3

0603

2

Not Stuffed

R4, R5

0603

2

Diodes

B340

D1

1812

1

Inductor

22

µH, Sumida

L1

CDRH104R-220

1

Table 2: Recommended components for standard output voltages

R1

R3

L1 minimum

1.22V

Short

Open

6.8

µH

1.5V

2.2K

Ω

10K

Ω

6.8

µH

1.8V

4.7K

Ω

10K

Ω

10

µH

2.5V

10.5K

Ω

10K

Ω

10

µH

3.3V

17.0K

Ω

10K

Ω

15

µH

5.0V

30.9K

Ω

10K

Ω

22

µH

Note: Refer to the MP1583 Datasheet’s Table IV Inductor Selection Guide for choosing L