Hi,
How much current doest the digital 1.8V supply draw. For my system, everything else is running of 3.3V off a lipo battery. I was thinking about using a buck boost to power my system with the load at 3.3. Then feed a small LDO at th 3.3 and give the 1.8 to the digital supply that way. The data sheet is a little vague or I am not reading it correctly. This way I can just use one buckboost and use a small say, 10, to 50mA LDO to source the 1.8 digial supply as opposed to having to find a buckboost with two outputs, one at 3.3v and another one at 1.8v.
Thanks.