I've just tested a design with LTM4676A as a replacement for LTM4676. The configuration applied by pin-strapping (no programing needed).
I did follow observation: In design with LTM4676 the limit of VIN is much higher than by LTM4676A. I cant even exhaust this limit because of surge-stopper limit (set to aprox. 18,2V) placed before. But in design with LTM4676A the part go off by aprox. 17,3 V.
That is not what I expected according to the data-sheet (page 42) and effects the entire functionality.