Thanks for the pointer to Pololu. A question about how they rate efficiency and quiescent current.http://www.pololu.com/product/2114/resources
Their data sheet lists efficiency as 80% for a given condition (input voltage above 3.3V for example). Let's say the input voltage is 3.3V and output voltage is also 3.3V. Does that mean that if the load (the wireless module) consumes 4uA, at 80% efficiency, you'd expect the whole thing to consume (1 / .8 * 4uA) = 5uA? Most of the time the wireless module is sipping current, so an overhead current of a couple uA from the regulator is no big deal. I can live with that, but I don't think I'm interpreting the datasheet correctly, because this next statement doesn't make sense:
Maximum quiescent current: 1 mA
*The highest quiescent currents occur at very low input voltages; for most of the input voltage range, the quiescent current is well below 1 mA
Let's say the input voltage is really low (like 0.8V) and you get into the inefficient condition for the regulator. Is that 1mA quiescent current apply to when output current is 0? Or when output current is at the rated 200mA? Not sure what they mean.
I don't really care about how efficient the regulator is at 150mA, since I'm only running at 150mA for a couple seconds a day. I'm more concerned with the low load conditions.
Is it weird this table of voltage regulators list "max INPUT current"? Isn't OUTPUT current what's important? Is that a typo?http://www.pololu.com/category/132/step-up-voltage-regulators
And they do it again in their specs, swapping input and output:
Here, they list "maximum output current":http://www.pololu.com/product/2114/specs
Then they switched to listing the maximum input current for a smililar regulator. Did they mean output in this case? It's a little confusinghttp://www.pololu.com/product/2561/specs
Thanks again for the help.
I'd also recommend pololu.