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How many LT8708-1 maximum can we put as slave to one LT8708 (our goal is 35 is it possible)

Category: Hardware
Product Number: LT8708-1

For  a new development we are developping a multiphase DCDC base on the LT8708 .
The maximum amount of phase can be extended to 35 . 
The clock is provided by an mcu and a local electronic is used to dephase the clock (sync signal) accordingly on each power board. 
Our question is if there is any functionnal reason limiting the number of LT8708-1 that can be put as slave in parrallel to one LT8708 master.
Have you made any tests on the matter ? 
Thx