https://ez.analog.com/power/f/q-a/583163/lt8645s-current-at-no-load-with-sync-pin-float
LT8645S current at no load with sync pin float - Q&A - Power Management - EngineerZone
The LT8645S on the newly made board draws a significant current, approximately 2.5W with 24V input, with no load applied and its SYNC pin left floating. I find...