I have a USB power source at 5V which needs to power a chip at ideally 4V (4.4V max) - but I need to be able to supply 2A of current for the "spike" current draws for the chip. In general the chip will probably only be drawing 200mA.
A simple voltage divider can get me the 4V, however I am not quite sure how to calculate the resistor values when it could draw anywhere from 10uA to 2A - the current draws could have wildly different resistance values.
I might be overthinking this myself, but does this still work as a simple voltage divider equation? You'd need resistors rated to handle the current, but is that all there is to it?
-- Yes, I've considered other circuit options for this kind of thing, I'm specifically wondering whether this could be done with a simple voltage divider.