legg wrote:
John Popelish wrote:

http://www.national.com/rap/Applicat...570,24,00.html
Which of the example structures in this reference do you
think is most closely related to the one I showed for the
LM78XX? None look similar to my not so educated eye.

I found an example of Band-Gap regulator reference bootstrapping in an
old design note from ~'83. This is Ferranti APN-27 by Bill Roy. Figure
3-7 shows a regular bandgap arrangement, while fogure 3-8 shows
bootstrapping similar to the 780x series.

Thanks for this document. It is rare in its explanation of
an internal detail of IC operation. It is the sort of thing
I have been looking for in my efforts to understand and
model these linear regulators.

--
Regards,

John Popelish