I just gave National Semiconductor’s Nano module a try. I was amazed with its performance.
Thought i would share with you guys for those looking for a 5v to 3.3v @ 1A power supply in a very small package.
After getting the demo board, and trying it out i then put one on one of my boards. I am so impressed with it.
Currently i have 5v in and its pushing 764ma out. Placing my finger on it i cannot even detect any temperature rise!
I took a photo of the demo board & put a 1206 resistor next to it to for size comparison.
Other things i like about it are minimal external parts. just need 3 caps & 2 resistors.
10uf on the input and output.
470pf on the ref pin
2 resistors to set the output voltage.
Digikey #: LMZ10501SEE/NOPBCT-ND
Thank you for sharing. I will definitely keep that in mind for my next design.
Apart from the tiddly size what’s the benefit over the usual voltage regs?
Well that is hard to say as there are so many regs out there today, and application specifics rule in/out many.
To kinda answer your question, typical switching power supplies require 3 main components. The IC, coil and flyback diode. This IC i mention here needs none of these.
So the final cost is lower. almost every design i have done uses nationals switchers. though i like them they will get a tad warm when pushing this kind of current. This one here runs cool as a cumber @ 750ma.
@ Architect - cheers fella
not cheap though; from Element14 here in AU, they’re showing 8.88 in 1’s (for some reason the ROHS one is 6.77, so I know what I’d be buying!). But as you say, the hidden cost is really in the “missing” components; the fact you don’t need to spend a lot of effort figuring out the right inductor is a huge plus, the fact they don’t generate heat more so.