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MP28248 Datasheet(PDF) 18 Page - Monolithic Power Systems

Part No. MP28248
Description  High-Efficiency, Fast-Transient, 3A, 4.2V-20V Input Synchronous Step-down Converter in a QFN12 (2x3mm) Package
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Maker  MPS [Monolithic Power Systems]
Homepage  http://www.monolithicpower.com
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MP28248 Datasheet(HTML) 18 Page - Monolithic Power Systems

 
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MP28248 – 3A, 4.2V-20V INPUT, FAST-TRANSIENT SYNCHRONOUS STEP-DOWN CONVERTER IN QFN12 (2X3mm)
MP28248 Rev. 1.0
www.MonolithicPower.com
18
1/5/2012
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
Layout Recommendation
1) The high current paths (GND, IN, and SW)
should be placed very close to the device
with short, wide, and direct traces.
2) Put the input capacitors as close to the IN
and GND pins as possible.
3) Put the decoupling capacitor as close to the
VCC and GND pins as possible.
4) Keep the switching node SW short and away
from the feedback network.
The external feedback resistors should be placed
next to the FB pin. Make sure that there is no via
on the FB trace.
5) Keep the BST voltage path (BST, R3, C3,
and SW) as short as possible.
6) Use a four-layer board to achieve better
thermal performance.


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