I designed and manufactured a PCB which utilized the LTC3895 to produce 5V DC power from 110V DC power. I referred to the standard schematic in the datasheet. Nothing changed, but the real output voltage followed the VIN. I am confused and do not know how to solve the problem.
I still list some data here.
1) the INTVCC is 5V.
2) the OVLO is 0.1V, far less than threshold 1.1V
3) input 12V DC, higher than minimum input voltage 8.0V
4) all testing is without load, because I am afraid of that high output voltage destroy the circuit.