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CS8363 Datasheet(PDF) 6 Page - ON Semiconductor

Part No. CS8363
Description  3.3 V Dual Micropower Low Dropout Regulator with ENABLE and RESET
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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CS8363 Datasheet(HTML) 6 Page - ON Semiconductor

   
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CS8363
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6
Heat Sinks
A heat sink effectively increases the surface area of the
package to improve the flow of heat away from the IC and
into the surrounding air.
Each material in the heat flow path between the IC and the
outside environment will have a thermal resistance. Like
series electrical resistances, these resistances are summed to
determine the value of RqJA:
R
QJA + RQJC ) RQCS ) RQSA
(3)
where:
RqJC = the junction−to−case thermal resistance,
RqCS = the case−to−heatsink thermal resistance, and
RqSA = the heatsink−to−ambient thermal resistance.
RqJC appears in the package section of the data sheet. Like
RqJA, it too is a function of package type. RqCS and RqSA are
functions of the package type, heatsink and the interface
between them. These values appear in heat sink data sheets
of heat sink manufacturers.


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