MAXREFDES1009 includes a TVS (D1, SMAJ58A-13-F) that is not an appropriate device for the application. The ABS MAX rating for the MAX17502 is 70V, where this TVS has a max breakdown above 70V.
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The maximum allowable soft start time for MAX17502 is 1 second. Kindly note that pushing the soft start time higher will require very careful design of the feedback loop.
