I have designed a board with an UA78M33CDCY voltage regulato which is connected as recommended in the datasheet.
When I hook it up to my 3.3v bench supply it boots fine. But powering it from the regulator does't give any response.
When a apply 12v power from a stable 3.3A psu the output of the regulator is reasonably stable at ~3.45v. Have I chosen the wrong voltage regulator or should I look for the problem somewhere else?