Not necessarily.  dsPIC30F2020 is a hog with a stated 1.2mA-2.4mA power 
down current even at 3.3v.

If you ran off of A76 watch batteries (150mA), the chip would run them 
down in under a week even when left off.

Similarly, the display current or, if you have a regulator, the 
regulator quiescent current- or even capacitor leakage- can greatly 
reduce the battery life in Sleep mode.
Some of the big processors can require significant current in Run mode.  
These small watch batteries are actually limited to a few mA.  For 
temporary bursts (going to high speed periodically) a cap *might* be 
able to supply the extra current but not for long.  The 30F is the big 
hog there, ~100mA @ 20MIPs @3.3v.  33F is less than half that at 20MIPs.

Danny

Bob Blick wrote:
>
> If you shut down when idle then most processors are comparable in terms
> of power usage, since a processor that uses less power will generally
> take more time to do the calculation. This is a generalization, but
> probably good enough.
>
> However the 32 series, even with the clock shut off, probably has much
> higher quiescent current drain.
>
>
>   

-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist