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Different results for FRA using LTpowerCAD and LTspice

Category: Software


I have a different results for LT8643S based step-down converter.

LTpowerCAD report closed loop bandwith 100kHz, LTspice 130kHz.
Which of them can be trusted?

See attachment, please.

Anyway... LTspice FRA settings is very poorly documented, I can not find any application notes or other sourses.

Only single basic and very short information available at

[edited by: Levandovsky at 10:43 AM (GMT -4) on 4 Apr 2023]

Top Replies

    •  Analog Employees 
    May 7, 2023 in reply to John Kevin +1 verified

    Hi ,

    Please be advised that the updated model for LT8643S is now available in the library. Please sync your library by going to Tool>Update components

    This result matches the result from LTpowerCAD…

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