I am looking for an efficient way to power a Microprocessor with a 2S LiPo. So this power converter should be very efficient transforming 7,4V to 3,3V with relatively low currents (~10mA).
When I look at the datasheets of power converters they often don't cover this area (~10mA).
Does that mean then don't work there at all - or are very inefficient?
LT3477
Pololu S7V8F3
I did a little poking around on Linear's site. They have a lot of switching regulators to look at. This part looks like it has a better chart and shows currents in the area you are talking about. http://www.linear.com/product/LTC1474 The LT3477 seems more aimed at higher current applications like something with a lot of LEDs. Have you done a switching regulator before? I've only done two so far. Some people have said they are finicky about layouts. Both worked for me. The definitely require more external parts than a linear regulator, though. Hopefully a real expert will chime in soon.
JoeN:
I've only done two so far. Some people have said they are finicky about layouts.
No, I haven't. Maybe the caps are finicky? When I look at some boards they use elcos:
www.ebay.com/itm/LM2596S-ADJ-Adjustable-Power-Module-DC-DC-Buck-Regulator-3A-5V-12V-24V-/191092001229
"Electrolytic caps are bad at the higher switching frequencies these supplies use (~1Mhz)"
http://forum.arduino.cc/index.php?topic=320610.msg2217782#msg2217782
