EV0077 Datasheet, PDF (4/4 Pages) Monolithic Power Systems – 1.3MHz Low Power Boost Converter

EV0077 (MP1541) 1.3MHz LOW POWER BOOST CONVERTER
EVALUATION BOARD - INITIAL RELEASE
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 2.5V ≤ V_IN ≤ 6V.
2. Turn Power Supply off.
3. Connect Power Supply terminals to:
a. Positive (+): VIN
b. Negative (–): GND
4. Connect Load to:
a. Positive (+): VOUT
b. Negative (–): GND
5. Turn Power Supply on after making connections.
6. The MP1541 is automatically enabled on the evaluation board once VIN is applied. To disable
the MP1541, connect the EN pin to ground.
7. The output voltage V_OUT can be changed by varying R3. Calculate the new value using the
fomula:
R3
=
⎜⎜⎝⎛
V_OUT
V_FB
− 1_{⎟⎟⎠⎞}R4
where V_FB = 1.25V and R4 = 11.8k Ω
For example, for V_OUT = 8V
R3 = ⎜⎛ ^8V − 1⎟⎞ × 11.8kΩ = 63.72kΩ
⎝ ^1.25V ⎠
Therefore use a 63.4k Ω standard 1% value.
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.
EV0077 (MP1541) Rev. 1.0
Monolithic Power Systems, Inc.
4
6/10/04
983 University Avenue, Building A, Los Gatos, CA 95032 USA
© 2004 MPS, Inc.
Tel: [phone] ♦ Fax: [phone] ♦ www.MonolithicPower.com