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EV9447-L-00A Datasheet(PDF) 7 Page - Monolithic Power Systems

Part No. EV9447-L-00A
Description  High-Efficiency, Fast-Transient, 5A, 36V Step-Down Converter Evaluation Board
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Maker  MPS [Monolithic Power Systems]
Homepage  http://www.monolithicpower.com
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EV9447-L-00A Datasheet(HTML) 7 Page - Monolithic Power Systems

   
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EV9447-L-00A – 5A, 36V, STEP-DOWN CONVERTER EVALUATION BOARD
NOTICE: The information in this document is subject to change without notice. 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.
EV9447-L-00A Rev. 1.0
www.MonolithicPower.com
7
5/1/2018
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2018 MPS. All Rights Reserved.
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 7V and 36V, and 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 MP9447GL will automatically startup.
5. To use the Enable function, apply a digital input to the EN pin. Drive EN higher than 1.25V to
turn on the regulator, drive EN less than 0.86V to turn it off.
6. An input under voltage lockout (UVLO) function is implemented by the addition of a resistor
divider R5 and R8. The EN threshold is 0.86V (falling edge), so VIN UVLO threshold is.
R5
0.86 (1
)
R8

7. Use R1 and R2 to set the output voltage with VFB = 0.815V. For R2 = 10kΩ, R1 can be
determined by:
OUT
R1 12.27 (V
0.815)
(kΩ). Follow the Application Information section in the
device datasheet to recalculate the compensation, inductor and output capacitor values when
output voltage is changed.


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