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L5963 Datasheet(PDF) 36 Page - STMicroelectronics

Part # L5963
Description  Dual monolithic switching regulator with LDO and HSD
PDF  45 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L5963 Datasheet(HTML) 36 Page - STMicroelectronics

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Thermal design
L5963
36/45
DocID028553 Rev 1
It is possible to improve performance and application thermal behavior, adopting some
expedients:
Use the bottom layer as heat-sink
Inner layer tracks are sunk to the ground plane
Use large paths for ground connections, instead of narrow and long paths with sharp
corners, and transfer all ground connections to other layers by a proper number of vias
Place compensation network very close to the chip to reduce noise
Put coils and capacitors close to the pins, and build output path with large and short
tracks
With the layout configuration shown in Figure 15, a Rth of 13°C/W has been reached.
Figure 15. Layout configuration example



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