AVR-Chat

Opinion without direct experience: you probably don't need
an additional regulator. You will need some good bypass
caps, size and value depending on the nature of the loads
driven by the micro. This is because the output resistance
of small batteries like this tends to be higher than you
might expect.

I assume that when you say "power cycling", you mean
periodically putting the micro into a low power mode? Or,
are you physically removing power?

Jim


On Thu, 30 Nov 2006 00:27:25 -0000
 "Richard Cooke" <rcooke@digitalwavelength.com> wrote:
> Hi Folks,
> 
> I'm working on a battery powered consumer product that
> will use a 3V
> button cell.  I think we've settled on the CR2032 which
> has a capacity
> of 225uAH.  Our circuit will use an ATtiny13 @ 1MHz along
> with a few
> other items.  The total current consumption is about
> 2.65ma when
> always ON.  I think I can reduce that to about 460uA by
> cycling the power.
> 
> My question to the group - can I just use the battery or
> do you think
> I'll need some type of regulator?  
> 
> The application will be mostly in the off state.  I'm
> planning to have
> the unit ON after being plugged into the  item to be
> controlled and
> then after 10 minutes go into the low power mode and then
> after 30
> minutes turn itself off.
> 
> Thanks,
> 
> Richard Cooke
> 

---------------------------------------------------------------
The Think Different Store
http://www.thinkdifferentstore.com/
For All Your Mac Gear
---------------------------------------------------------------