Re:

>As a variation on this theme what about using a Raytheon RC4190 micropower
>Switching Regulator as a battery extender.
>With a 6 volt battery you could let the battery voltage drop to 5 volts when
>the regulator would kick in holding the output at 5 volts right down to a
>battery voltage of 1.8 volts. There is also an additional bonus of a low
>battery output that would go low at 2.2 volts. The supply current required
>by this IC is 215uA and the input voltage range 2.2 to 24 volts, switch
>current 200mA. Instead of a 6 volt battery, use a 4.5 volt but keep the
>output at 5 volt.


That is a sweet-sounding part. I'll have to check it out.
--

  ______________________________________
   Andrew E. Kalman, Ph.D.   aek@pumpkininc.com

--
http://www.piclist.com hint: To leave the PICList
mailto:piclist-unsubscribe-request@mitvma.mit.edu