So far yes.
This is sort of complex, but here is the full story.
The main reason for the RevB board is that the DAC has a leakage problem. If you have a DVI/HDMI connection, sufficient current leaks back from the monitor and powers the 3.3V supply.
To fix this, a 5V to 3.3V LDO was added to this board as Chrontel recommend. For the prototype it worked well. I couldn't get the part I wanted for the first 10 boards so I used a microchip part.
It's not a good idea to run the main power through the slide-switch only the 5V supply goes through the switch and the high current DC-DCs are driven from the 5V input with the enable line driven from the 5V switch supply. This is a good simple low cost approach, but has the problem that if there is any leakage from the low voltage supplies back onto the 5V line then the DC-DCs will not turn off.
So, the board is a bit of a zombie. You turn it on. It goes on, You turn it off .... it stays on.
Most LDOs will turn off the FET when the input voltage drops below a certain threshold. This one does not, so I get about 1.6 V fed onto the 5V line. This is enough on some boards to keep the DCDCs running.
The other LDO I have works fine so I just need to fit a different one.
The differences to the RevA board are minor and there are 7 of those running for over a year now perfectly stable.
Best,
Mike
