From: "Klaus Vestergaard Kragelund"
References: <email@example.com> <firstname.lastname@example.org> <10Pq9.508$Vv3.email@example.com>
Subject: Re: 1.6V zener diodes?
Date: Tue, 15 Oct 2002 23:11:34 -0400
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Organization: TDC Internet
"Winfield Hill" wrote in message
> Steve WB4CZR wrote...
> > In all of this discussion, did anyone ever get an answer as to the
> > application? Using a simple bandgap reg circuit you could basically
> > get a low noise, low drift, low dynamic impedance voltage source.
> > If you want lots of noise, bad regulation, loads of drift, with a
> > "who knows" kind of make tolerance for the knee voltage, then keep
> > looking for the zener. A knee of 1.6 +/- 20% would not surprise me.
> Yes, shortly after the OP posted his question, Phil Allison suggested
> a single-transistor Vbe-reference "zener" and I suggested using an
> LM-385-ADJ with 22k and 10k for accurate 0.05 to 20mA zener action
> at 1.60 volts. Later Tom Bruhns suggested the LM4041-adj part.
> 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.
> - Win
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