LTC3769 is applied in the circuit with 18V input boost and 31V output. It cannot output 100W at -40 degrees, but can reach 100W at -20 degrees.

LTC3769 is applied in the circuit with 18V input boost and 31V output. It cannot output 100W at -40 degrees, but can reach 100W at -20 degrees. What parameters and peripherals are related to the low low-temperature output power of the circuit IC?Is there any way to improve it? Thank you!

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    •  Analog Employees 
    on Mar 11, 2021 12:57 AM

    Hi, 

    Details about the temperature range of LTC3769 are specified on page 4, note 2 of the datasheet. Operation at -40degrees also depends on the temperature rating of other components attached to LTC3769. If you need to operate at -40 degrees, I would suggest you to put a little margin on the lower temperature specs by using -55degrees rated components. 

    Regards, 

    Fritz