I have an application, that consist of 2 boards:
- "MCU-Board" (powered by USB or by the "Base-Board")
- "Base-Board" (powered by 12V or by the "MCU-Bord")
In normal operation this boards are plugged together, and powered by 12V (automotive).
my Idea was to use two LT3012 and make use of the built-in "reverse current protection" of this part.
# When the boards are sparated, both boards have to run on its own.
# Can I plug the boards together (3,3V/GND) without using any additional diode or switching logic ? (by using the built in "reverse current protection" of the LT3012)
# When plugged together both(!) boards have to run from the "5V-USB" only OR from the "12V-automotive" only OR even both(!) of this supplies connected.
# there is no need for load-sharing
Is it "allowed"/possible to simply connect the two outputs of the two LT3012 together in the described way ?