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Hi, I have two power source... 12V and 5V... that will supply my buck regulator to 3.3V. My estimated buck input current is arround 5A.. Since this is very big for my 5V/12V connector (Only have 3A rating), I want to distribute from 12V and 5V like 3A from 12V and 2A from 5V or 2.5A from 12V and 2.5A from 5V. How to do this? Because when you connect the 2 supplies (12V and 5V) in parallel with two diodes, obviously 12V will dominate.