EV2303DN-00A – 3A, 28V, 340KHz SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER

EVALUATION BOARD

NOTICE:

The information in this document is subject to change without notice. Please contact MPS for current specifications.

Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS

products into any application. MPS will not assume any legal responsibility for any said applications.

EV2303DN-00A Rev. 1.1

www.MonolithicPower.com

4

2/13/2006

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2006 MPS. All Rights Reserved.

TM

QUICK START GUIDE

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

respectively.

2. Preset the power supply output to between 4.75V and 28V, then turn it off.

3. Connect the positive and negative terminals of the power supply output to the VIN and GND

pins, respectively.

4. Turn the power supply on (the MP2303 will automatically startup).

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

on the regulator or less than 0.7V to turn it off.

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

divider (R4 and R5). The Enable threshold is 2.5V, so the VIN UVLO threshold is:

V

5

.

2

5

R

4

R

1

×

⎟

⎠

⎞

⎜

⎝

⎛ +

.