PSU design?

[Arthur Harrison]

My 2 cents:  I echo the preference for those 723s.
Amazing that this oldie has withstood the test of time.
One little disadvantage it is the large drop-out voltage.
However, I believe the 723's ripple rejection is actually
better than many of those newer "LDOs."
(Go figure; all that loop gain, and only 50dB of ripple rejection!)

I like to make my own tracking VRs out of OP297s, REF10s, and
discrete power transistors.  However, adding foldback is a hassel,
and the 723s do that for you.

-Art

-----Original Message-----
From: jhaible <jhaible at primus-online.de>
To: synth-diy at mailhost.bpa.nl <synth-diy at mailhost.bpa.nl>; Per Mattsson
<per.mattsson at mkv.mh.se>
Date: Thursday, December 17, 1998 1:23 PM
Subject: Re: PSU design?


>723 !
>
>JH.
>
>> I'm about to build  a new +/-15 v PSU. Currently I'm choosing between two
>> designs, either one based on 7815/7915 or the Digisound 80 design using
>> two uA723C's.
>>
>> It's meant power a modular unit with your average mix of oscillators,
>> filters, mixers,  weirdo circuits etc. I probably need a second +5 v PSU
>> to drive those digital ICs but I already have a small computer PSU for
>> this.
>>
>> Any thoughts on what to design to use?
>>
>> ---Per Mattsson
>>
>>
>