[sdiy] 723 regulator compensation question

[Pete Swarbrick]

FWIW, I have always used 470pF for this cap and never had any
instability issues with the 40 or 50  723-based PSUs I have built over
the years, Veroboard, PCB or rat's nest.


Pete

Peter Swarbrick
Head of Digital Imaging
Panavision Europe
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-----Original Message-----
From: synth-diy-bounces at dropmix.xs4all.nl
[mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of Louis van
Dompselaar
Sent: 07 December 2007 12:06
To: synth-diy at dropmix.xs4all.nl
Subject: Re: [sdiy] 723 regulator compensation question

I just pulled out one 723 design I know of (from the Transcendent) and
that
has 330pF between pins 4 (not 5) and 13.  So 100nF does seem a bit
large.

> after looking at the data sheet I see that the compensation cap is 
> shown as 100pf. ( pin 13 to pin 5 )
> but on the veroboard I've used I notice that it is a 100nf cap.
> I just wondered which value was correct ? 

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