EV0015

3A MP1583

Step Down Converter

EV0015 Rev 1.0_11/21/02

www.monolithicpower.com

2

Monolithic Power Systems

Figure 2: EV0015 Evaluation Board Schematic

This board accommodates most commonly used Inductors and Output Capacitors and can be programmed for

voltage.

C2

10

µF/35v

C5

22

µF

10V

R3

10K

Ω

C4

100pF

C1

10nF

C3

10nF

R1

10.5K

Ω

R2

10K

Ω

C6 = NS

U1

CN1

J1

R4 = NS

R5 = NS

C7 = NS

CN2

L1

15

µH

D1

B340

EN

SS

GND

VIN

VOUT

VOUT

GND

GND

1

2 3

Note: NS = No Stuff

Not Applicable to this circuit

Board Operation

This output voltage of this board is set to 2.5V. The board layout accommodates most commonly used inductors

and output capacitors.

1.

Attach positive end of load to VOUT pins and negative end of load to GND pins of connector CN2.

2.

3.

Applying a voltage greater than 2.495V to pin 4 of CN1 enables the MP1580. Leave the input

unconnected if unused.

An Under Voltage Lockout (UVLO) function can be implemented by the

addition of a resistor divider from VIN to GND. For complete low current shutdown its needs to be

less than 0.7V.

4.

To use Enable function stuff R4 with a 10K

Ω resistor and connect pins 1 and 2 of Jumper J1.