LM25119: What is the best way to calculate the junction temperature?

Kevin Lai

Part Number: LM25119

Hi team,

customer wants to know what is the best way to calculate the junction temperature considering the PCB temp max is 85C.

also, what is your suggestion for temperature de-rating for our buck controllers for around a 10 year period?

do we have any shareable collateral on this topic for best practices?

Thanks,

Kevin

0 Kevin Lai over 3 years ago

bumping this for support thanks.

0 Matt Schurmann over 3 years ago in reply to Kevin Lai

Thanks for your patience. It is a holiday week in the USA and replies will be a little slower until the new year.

There is a simple summary of using thermal metrics in our datasheets here.

You can reference the quality/reliability information for this device here.

There is a thermal de-rating FIT calculator, here

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