On Tue, 22 Dec 2009 17:51:05 -0700, you wrote:

>Good day to all.
>
>I'm searching for a low-cost negative 5V regulator that is reasonably 
>accurate.  Something similar to National's LP2950A but for a negative 
>rail would be perfect.
>
>I need only about 10mA and there is a -10V or -12V supply available 
>to power the thing.  I need at least 1% accuracy, more accurate would 
>be better.
>
>I'd use a 79L05 except for its poor accuracy.


for 10mA you could probably use a reference and an opamp. 
If you already have an accurate +5v rail, a simple -1 gain inverting amp configuration may be
sufficient.

>Anyone have any suggestions?
>
>Many thanks!
>
>dwayne
>
>-- 
>Dwayne Reid   <dwayner@planet.eon.net>
>Trinity Electronics Systems Ltd    Edmonton, AB, CANADA
>(780) 489-3199 voice          (780) 487-6397 fax
>www.trinity-electronics.com
>Custom Electronics Design and Manufacturing

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