SJ1117-18Q 参数 Datasheet PDF下载

SJ1117xxx

◈

Application Note

Thermal Considerations

SJ1117 series regulator have internal thermal limiting circuitry designed to protect the device during

overload conditions. For continuous normal load conditions however, the maximum junction temperature

rating of 125℃ must not be exceeded.

The thermal resistance for each application will be affected by thermal interactions with other

components on the board. Some experimentation will be necessary to determine the actual value.

Calculation

Power Dissipation : P

D

= (V

IN

– V

OUT

)

x

(I

OUT

)

Maximum junction temperature : T

J

=T

A(MAX)

+P

D

KSD-I0T005-008

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