LM22677: LM22677 alternativ or newer reliability data

Sorry half of the question is missing:


In our safety critical system we have to perform a MTBF / FIT-Rate calculation. Therefore I'm often using the data from the TI-Website: www.ti.com/.../estimator.tsp for the LM22677 I've got only 6.9 FIT compared to other switcher (for example the LM73605 with 0.2 FIT) this value is quite poor. Does this only rely on the small sample size? Do you may have newer values?

Hi David,

I have reached out to the designer for clarification on the FIT results from the calculator, and I will get back to you with feedback on your questions.

Thank you,
Katelyn Wiggenhorn

Hello Katelyn,

Thank you for the reply, these two question are exactly those I asked. Nerveless we have to perform a prediction calculation about the MTBF value and this means that the LM22677 could not be used and the LM73605 instead.

Best regards,
David