ncv4279c ON Semiconductor, ncv4279c Datasheet - Page 9
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ncv4279c
Manufacturer Part Number
ncv4279c
Description
5.0 V Micropower 150 Ma Ldo Linear Regulator With Delay, Adjustable Reset, And Monitor Flag
Manufacturer
ON Semiconductor
Datasheet
1.NCV4279C.pdf
(12 pages)
package to improve the flow of heat away from the IC and
into the surrounding air.
outside environment will have a thermal resistance. Like
series electrical resistances, these resistances are summed to
determine the value of R
where:
A heatsink effectively increases the surface area of the
Each material in the heat flow path between the IC and the
R
R
R
θJC
θCS
θSA
= the junction- -to- -case thermal resistance,
= the case- -to- -heatsink thermal resistance, and
= the heatsink- -to- -ambient thermal resistance.
R θJA = R θJC + R θCS + R θSA
HEATSINKS
θJA
:
http://onsemi.com
(3)
9
R
functions of the package type, heatsink and the interface
between them. These values appear in heatsink data sheets
of heat sink manufacturers.
the application note, AN1040/D, “Mounting Considerations
for
ON Semiconductor web site.
ON Semiconductor applications note AN1040/D.
θJA
R
Further mounting and cooling information is available in
Thermal, mounting, and heatsinking are discussed in the
θJC
, it too is a function of package type. R
Power
appears in the package section of the data sheet. Like
Semiconductors”
located
θCS
and R
in
θSA
the
are