Pixhawk Cube

Hello, I am working on a project that uses the pixhawk cube on a hybrid drone system. We are developing the hybrid filtering circuit and need guidance on the sensitivity of the pixhawk power supply/module to voltage fluctuations.

I see that we have a voltage range of 4.1-5.7V at 2.5 A , but are they any concerns of failures due to quick voltage fluctuations within this range?

Are there any separate considerations for power filtering for the other power rails on the board? Thank you for any help you can provide.