Low voltage Pic

[ruijc]

Hi all,

Just a quick question,

I'm currently working on a project that it would be better if supplyed with a 1,2V or 1,5V battery.

I've searched some pics and they all work with 2,5V and above.

Does microchip has any pic that can work with 1.2V ? If yes which one ?

Thanks

[sayzer]

if you can not find one, then try using one of those tiny DC to DC converters.

1.5V to 5V or 1.5V to 6V.
As much as I know, tiny ones are good for 75mA.

[ruijc]

Thanks alot sayzer :)

that can be a very good option ;)

Do you have some references of those tiny DC to DC converters that i can start with ?

.

[Dave]

ruijc, Try a MAX1724. I use them all of the time. Good upconvertor.....

Dave Purola,
N8NTA

[ruijc]

Thanks Dave,

I've checked these converters and they look very good ;)

One question though...
Do we really need the coil for it to work ?

thanks

[sayzer]

ruijc,

Check Figure7 on MAX1724 datasheet. You can adjust the output voltage.

Nice chip Dave.



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[ruijc]

Yes...i did see that ;)

nice idea indeed. This is a good solution that i will test :)

My question now is about that 10uH coil...can i live without it ?

I need as less componets as possible and no coils if possible.
.

[skimask]

Yes...i did see that ;)
nice idea indeed. This is a good solution that i will test :)
My question now is about that 10uH coil...can i live without it ?
I need as less componets as possible and no coils if possible.
.

The inductance provided by a coil is at the heart of most boost converter (as well as buck and flyback topologies). So, the answer is no, you can't live without it, at least not with this application.
Although, if you do some searching, you'll find suitable coils with very small dimensions.