I have made a custom Arduino board with a 3.3v Simple switcher from TI - LM22680. The board consists of just the 3.3v power supply, the Atmega328P, its 16MHz crystal, the 22pF decoupling caps.
I have all the pin coming out of the Atmega directed to the same pinouts as that of the original Arduino board. Now I want to use the original Ethernet shield with my board but I want to do it without using the 3.3v regulator on the Ethernet shield. I want to use the LM22680 to power the Ethernet shield as well. So how do I do this?
Should I just remove the 3.3v regulator thats there on the Ethernet Shield?? My main question is that how should I bypass the voltage regulator on the Ethernet shield so the it'll use the supply from the LM22680.