Thread: 723 psu issues.
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Old 15th Nov 2018, 1:01 pm   #6
turretslug
Nonode
 
Join Date: Nov 2011
Location: Surrey, UK.
Posts: 2,803
Default Re: 723 psu issues.

It's the compensation capacitor for the internal error amp- the 723 might be used with just its own internal pass transistor for a low-current load, or sometimes with an impressive fan-out of external pass transistors. Often, including the internal driver, this amounts to a triple Darlington, sometimes complimentary, more often seemingly an NPN cascade. That application flexibility amounts to a great deal of possible variation in frequency response characteristic, hence the need to choose an appropriate value comp cap.- in most circuits, it seems to range from 100pF to 1nF.
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