> - Read the spec sheet and do whatever it says you need to do.

That's always essential, but I'm surprised nobody has stepped back and asked
a broader question.  Why is this guy using an LDO when he wants 3.3V out
from at least 8V in?  At the nominal 9V in he will spend 63% of the power
heating the regulator.  This will likely be the limiting factor on the
current capacity, not the maximum current specified in the data sheet.  He
also said that this will usually be run from a 9V battery, and therefore
total power consumption is probably important.  All this points to the wrong
choice of regulator in the first place.

My first reaction given only this information would be to use a switcher.


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