EV1517DR-00B Datasheet, PDF (4/4 Pages) Monolithic Power Systems – 3.3V, 1A Sepic Evaluation Board

TM
EV1517DR-00B – 3.3V, 1A SEPIC EVALUATION BOARD
QUICK START GUIDE
The output voltage of this board is set to 12V. The board layout accommodates most commonly used
inductors and output capacitors.
1. Preset Power Supply to 3V ≤ V_IN ≤ 4.2V.
2. Turn Power Supply off.
3. Connect Power Supply terminals to:
Positive (+): VIN, EN
Negative (–): GND
4. Connect Load to:
Positive (+): VOUT
Negative (–): GND
5. Turn Power Supply on after making connections.
6. The MP1517 is enabled on the evaluation board once V_IN is applied. To disable the MP1517,
disconnect EN from VIN.
7. The output voltage V_OUT can be changed by varying R1. Calculate the new value using the
formula:
R1
=
⎜⎜⎝⎛
V_OUT
V_FB
− 1_{⎟⎟⎠⎞}R2
Where V_FB = 0.7V and R2 = 10kΩ
For example, for V_OUT = 3.6V
R1 = ⎜⎛ ^3.6V − 1⎟⎞ × 10kΩ = 41.4kΩ
⎝ ^0.7V ⎠
Therefore use a 41.2kΩ standard 1% value resistor.
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.
EV1517DR-00B Rev. 1.0
www.MonolithicPower.com
4
12/21/2005
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