From: firstname.lastname@example.org (carltons)
Subject: Re: 1.6V zener diodes?
References: <email@example.com> <firstname.lastname@example.org> <10Pq9.508$Vv3.email@example.com> <firstname.lastname@example.org>
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NNTP-Posting-Date: Wed, 16 Oct 2002 08:28:20 GMT
Date: Wed, 16 Oct 2002 08:28:20 GMT
In article , Winfield Hill
> "Klaus wrote...
> >"Winfield Hill" wrote
> >> The LMV-431 is another of the adjustable shunt regulators with 1.23
> >> to 1.25V internal references, all well-suited for making low-voltage
> >> zeners down to 1.25V. ON Semiconductor offers the NCP100, which
> >> features an unusual 0.70V reference, and works down to 0.9 volts.
> >> Its current range is 0.1 to 20mA not counting the divider resistors.
> > And if you choose to stock the LMV-431 you have a part that can be used
> > for numerous purposes. For example it is widely popular for secondary
> > regulation (error amplifier) in switch-mode supplies
> That's the TL431A, originally a TI part. NSC's new LMV-431 is sort
> of a "clone," but it operates at lower power levels, and has a 1.25V
> reference instead of a 2.50V reference like the TL431, so it's not
> exactly a drop-in replacement. Also, the LMV-431 can only go to
> 20mA and 30V, whereas the TL431 can go to 100mA and 36V...
> - Win
All of the suggestions other than the use of a zener of any sort sound
good to me. A Zener is okay for ESD protection as a last resort, but
other than that, it has gone the way of the 6AL5 tube diode. Oh yeah! I
almost forgot. They make dandy wideband noise sources. BTW, I'm using
the term zener loosely. I'm including the diodes rated above 5.6v, which
are technically avalanche diodes.