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MP9447 Datasheet(PDF) 17 Page - Monolithic Power Systems

No. de Pieza. MP9447
Descripción  High-Efficiency, Fast-Transient, 5A, 36V Synchronous, Step-Down Converter
Descarga  19 Pages
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Fabricante  MPS [Monolithic Power Systems]
Página de inicio  http://www.monolithicpower.com
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MP9447 Datasheet(HTML) 17 Page - Monolithic Power Systems

 
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MP9447–HIGH-EFFICIENCY, FAST-TRANSIENT, SYNCHRONOUS, STEP-DOWN CONVERTER
MP9447 Rev. 1.2
www.MonolithicPower.com
17
1/5/2016
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2016 MPS. All Rights Reserved.
LAYOUT RECOMMENDATION
1. Place high-current paths (GND, IN, and SW)
very close to the device with short, direct, and
wide traces.
2. Place input capacitors on both VIN sides
(PIN8 and PIN19) and as close to the IN and
GND pins as possible.
3. Place 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.
5. Place the external feedback resistors next to
the FB pin. Do not place vias on the FB trace.
6. Keep the BST voltage path (BST, C3, and
SW) as short as possible.
7. Connect the bottom IN and SW pads to a
large copper area to achieve better thermal
performance.
8. A Four-layer layout is strongly recommended
to achieve better thermal performance.
C2A
C2B
Top Layer
Inner1 Layer
Inner2 Layer
Bottom Layer
Figure 10: PCB Layout


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