On Tue, 16 Mar 2004 10:03:37 -0700, you wrote:

>At 05:50 AM 3/16/2004, Anthony Toft wrote:
>> > Not stupid in the least. In fact a lot of novices brag about using =
low
>> power
>> > parts with a battery. But further into the discussion you realize =
that they
>> > are using a linear regulator that's sucking down almost half the =
battery's
>> > power.
>>
>>So which are the better regulators to use? As a non EE I generally =
stick
>>to what I know, and I have used the 78l05 in my project, but if that's
>>not the best (and it strongly sounds like it) I would like to educate
>>myself in the better devices.
>
>BTW - please use a capital "L" in that part number - the lower case "l"
>looks like a "1".
>
>The 78Lxx family is great for most line-powered applications.  Its just =
too
>darned inexpensive to ignore.  That said - I find I now use more LP2950A
>regulators than any other chip regulator - its initial accuracy is 0.5% =
and
>that makes it excellent for the medium accuracy a/d readings that many =
of
>my products use.  Its also OK for most of the battery operated devices =
that
>I design - the regulator uses about 100 uA quiescent but that is small
>compared to the overall consumption.
>
>If a battery-powered product needs to keep the regulator live all the =
time,
>I use the TC55 series from Telcom (now Microchip).  But - its being
>discontinued and I have not yet investigated alternatives.

Check out HT7150 (and others for other voltages) from Holtek - cheap, a =
microamp or two quiescent,
and takes inputs up to 24V.

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