I am designing power supply for CM3+ board and got few questions. I decided to use 2 LDO's (3V3 and 1V8 outputs both from 5V usb VBUS). Wanted to ask if its good solution or maybe connect 1V8 to 3V3 LDO output and why? Also is only MOSFET transistor enough for hot plug feature and how to chose it suitably for power supply?
Datasheet says that:
Supplies should be staggered so that the highest voltage comes up first, then the remaining voltages in descending order.
I see they manage the problem with just RC delay, but I don't really know what does 0R resistor means is it zero ohm resistor, or the vaule isn't fixed by the developer of the board, if so how to the vaule of resistor?
Sorry for such simply questions.