I am working with a micro controller based board design. We need to power this board from another micro controller based board that has regulated 3.3V power output connector. These two boards will be connected by a one foot cable for power and UART. The micro in the board we are designing needs 3.3V for its peripherals and SDRAM and
1.2V for the core.Is it OK to give regulated 3.3V from another board directly (using adequate bypass capacitors) for this micro's peripheral and SDRAM and through an LDO or switching regulator outputting 1.2V to the core? The
3.3V supply will have source approx 500ma current which is sufficient for my board.- bhav