NCV8501 ON Semiconductor, NCV8501 Datasheet - Page 13

• Manufacturer Part Number: NCV8501
• Description: 2.5v, 3.3v, 5.0v, 8v, 10v, Adj./150ma Low Quiescent Current Ldo W/ Reset, Enable And Early Warning
• Manufacturer: ON Semiconductor

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
A heatsink effectively increases the surface area of the
Each material in the heat flow path between the IC and the
R qJA + R qJC ) R qCS ) R qSA
HEATSINKS
qJA
:
NCV8501 Series
http://onsemi.com
(eq. 3)
13
where:
R
functions of the package type, heatsink and the interface
between them. These values appear in heatsink data sheets
of heatsink manufacturers.
qJA
R
R
R
R
qJC
qCS
qSA
qJC
, it too is a function of package type. R
appears in the package section of the data sheet. Like
= the junction-to-case thermal resistance,
= the case-to-heatsink thermal resistance, and
= the heatsink-to-ambient thermal resistance.
qCS
and R
qSA
are