EV2358DQ-00A Datasheet, PDF (4/4 Pages) Monolithic Power Systems – 2A, 23V, 370KHz Step-Down Converter Evaluation Board

TM
EV2358DQ-00A – 2A, 23V, 370KHz STEP-DOWN CONVERTER EVALUATION BOARD
QUICK START GUIDE
The output voltage of this board is preset to 3.3V. The board is laid out to accommodate most
commonly used inductors and output capacitors.
1. Connect the positive and negative ends of the load to the VOUT and GND pins, respectively.
2. Connect the input voltage (4.75V ≤ V_IN ≤ 23V) and input ground to the VIN and GND pins,
respectively.
3. To turn on the MP2358, apply an enable voltage V_EN to the EN pin. Drive EN higher than 1V to
turn on the MP2358 or lower than 0.4V to turn it off.
4. The output voltage V_OUT can be programmed by varying R1. Calculate the new value using the
formula:
R1 = R3 × ( ^VOUT − 1)
V_FB
Where V_FB = 0.9V and R3 = 10kΩ.
For example, for V_OUT = 2.5V:
R1 = R3 × ( ^VOUT − 1) = 10kΩ × ( ^2.5V − 1) = 17.78kΩ ~ 17.8kΩ
V_FB
0.9V
for the closest standard 1% value.
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.
EV2358DQ-00A Rev. 1.1
www.MonolithicPower.com
4
1/9/2006
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© 2006 MPS. All Rights Reserved.