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EV0033 Datasheet(PDF) 5 Page - Monolithic Power Systems

Part No. EV0033
Description  1.2A, 6V, 800KHz Synchronous Rectified Step-Down Converter
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Maker  MPS [Monolithic Power Systems]
Homepage  http://www.monolithicpower.com
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EV0033 Datasheet(HTML) 5 Page - Monolithic Power Systems

   
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EV0033 – 1.2A, 6V, 800KHz SYNCHRONOUS RECTIFIED STEP-DOWN CONVERTER
EVALUATION BOARD
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.
EV0033 Rev. 1.4
www.MonolithicPower.com
5
4/22/2005
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
QUICK START GUIDE
The output voltage of this board is set to 1.8V. The board layout accommodates most commonly used
inductors and output capacitors.
1. Attach the positive and negative ends of the load to the OUT and GND pins respectively.
2. Attach an input voltage 2.6V
≤ VIN ≤ 6V and the input ground to the IN and GND pins,
respectively.
3. To enable the MP1567 apply a voltage, 2V
≤ VEN ≤ 6V, to the EN pin. To disable the MP1567
connect the EN pin to ground.
4. The output voltage VOUT can be changed by varying R3. Calculate the new value using the
formula:
⎟⎟
⎜⎜
×
=
1
V
V
4
R
3
R
FB
OUT
Where VFB = 0.9V and R4 = 10kΩ.
For example, for VOUT = 2.5V:
=
×
=
⎟⎟
⎜⎜
×
=
k
78
.
17
1
V
9
.
0
V
5
.
2
k
10
1
V
V
4
R
3
R
FB
OUT
Therefore use a standard 1% value 17.8kΩ resistor.
Note: See Maximum Duty Cycle limits to determine allowable output voltages.


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