Why is R26 4.75K instead of recommended 100K ?

maybe wrong forum to ask ?

also why is the TPS65217C not replaced with TPS65217D to support the DDR3L with 1.35V

just wondering as I go trough the design

I decided to stick with rge TLS65317c because there was no reason to go to the D as it was new and not in ready supply. And it works.

As to rhe resistor I would need to research that at some point.