[time-nuts] Linear voltage regulator hints...

Dave M dgminala at mediacombb.net
Mon Dec 8 19:33:05 EST 2014

Dan Kemppainen wrote:
> Hi,
> In playing with some oscillators and a GPSDO here, I think I'm seeing
> a voltage sensitivity issue.
> So, I started looking at the output voltage of various regulators vs.
> temp. Using standard LM/UA type linear regulators and some LDO's, they
> all appear to be pretty sensitive to temperature. (millivolt / few
> degrees Fahrenheit sort of sensitivity). Most of the datasheets seem
> to ignore temp sensitivity. Almost like they are so bad they don't
> want to publish it...
> Does anyone have hints on TO-220 or D-Pak type regulators that have
> really good temp coefficients and good line regulation? A few PPM/Deg
> C might be nice, if possible. Or am I into a 'roll you own' type
> design...
> Dan

Yes, in order to get low PPM stability, you are going to "roll your own". 
No 3-terminal regulator or reference that I know of can run an OXCO (heater 
and oscillator).
What are your voltage and current requirements?

Dave M 

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