EV1593DN-00A – 4.75V-28V INPUT, UP TO 3A OUTPUT STEP-DOWN CONVERTER

EVALUATION BOARD - INITIAL RELEASE

NOTICE:

MPS believes the information in this document to be accurate and reliable. However, it is subject to change without

notice. Contact MPS for current specifications. MPS encourages users of its products to ensure that third party Intellectual

Property rights are not infringed upon when integrating MPS products into any application. MPS cannot assume any legal

responsibility for any said applications.

EV1593DN-00A (MP1593) Rev. 1.0

Monolithic Power Systems, Inc.

5

8/4/04

983 University Avenue, Building A, Los Gatos, CA 95032 USA

© 2004 MPS, Inc.

Tel: 408-357-6600

♦ Fax: 408-357-6601 ♦ www.MonolithicPower.com

QUICK START GUIDE

1. Connect the positive terminal of the load to VOUT pins, and the negative terminal of the load to

GND pins

2. Preset the power supply output to 4.75V – 28V and turn off the power supply.

3. Connect the positive terminal of the power supply output to the VIN pin and the negative

terminal of the power supply output to the GND pin

4. Turn the power supply on. The MP1593 will automatically startup.

5. To use the Enable function, apply a digital input to EN pin. Drive EN higher than 2.5V to turn on

the regulator, drive EN less than 0.7V to turn it off.

6. An input under voltage lockout (UVLO) function can be implemented by the addition of a resistor

divider R4 and R5.

V

5

.

2

5

R

4

R

1

×

⎟

⎠

⎞

⎜

⎝

⎛ +

.

RECOMMENDED COMPONENTS FOR STANDARD OUTPUT VOLTAGES

The output voltage of this board is set to 3.3V.

This board is laid out to accommodate most

commonly used inductors and output capacitors

and to be programmed for most standard output

voltages. The following table lists recommended

components for some standard output voltages.

Listed compensation components (R2, C3)

values are based on the output capacitor

installed on this board. For other capacitors,

refer to the Application Information section in

the MP1593 datasheet.

Table 1—Recommended Components for Standard Output Voltages

VOUT

R1

R2

C3

L1

1.8V

4.75kΩ

3kΩ

4.7nF

4.7µH

2.5V

10.5kΩ

3.9kΩ

5.6nF

4.7-6.8µH

3.3V

16.9kΩ

5.6kΩ

8.2nF

6.8-10µH

5V

30.9kΩ

7.5kΩ

10nF

10-15µH

12V

88.7kΩ

10kΩ

3.3nF

15-22µH