EV1542DK-00A Datasheet, PDF (4/4 Pages) Monolithic Power Systems – 700KHz/1.3MHz Boost Converter with a 2A Switch

TM
EV1542DK-00A — 700KHz/1.3MHz BOOST CONVERTER WITH A 2A SWITCH
EVALUATION BOARD
QUICK START GUIDE
The output voltage of this board is set to 8V. The board layout accommodates most commonly used
inductors and output capacitors.
1. Preset Power Supply to 2.5V ≤ V_IN ≤ 6V.
2. Turn Power Supply off.
3. Connect Power Supply terminals to:
a. Positive (+): IN, EN
b. Negative (–): GND
4. Connect Load to:
a. Positive (+): OUT
b. Negative (–): GND
5. Turn Power Supply on after making connections.
6. The MP1542 is enabled on the evaluation board once V_IN is applied. To disable the MP1542,
disconnect EN from IN.
7. The output voltage V_OUT can be changed by varying R1. Calculate the new value using the
fomula:
R1
=
⎜⎜⎝⎛
V_OUT
V_FB
− 1_{⎟⎟⎠⎞}R2
Where V_FB = 1.25V and R2 = 10kΩ
For example, for V_OUT = 12V
R1 = ⎜⎛ ^12V − 1⎟⎞ × 10kΩ = 86kΩ
⎝ ^1.25V ⎠
Therefore use an 86.6kΩ standard 1% value.
For output voltages greater than 10V, the output capacitor C2 needs to be replaced with a
capacitor with a higher voltage rating suitable for the new output voltage.
8. The switching frequency is set to 1.3MHz if jumper JP1 is shunted between 1 and 2. To get
700KHz operation, shunt JP1 between 2 and 3.
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.
EV1542DK-00A Rev. 1.2
www.MonolithicPower.com
4
6/8/2005
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