LTSpice model for a 2V zener or less

[rhythmsandy]

Im trying to simulate a circuit with low voltage zeners but couldnt find anything in 2V range in LTspice can anybody give me a LTSpice model for the low voltage zener please.

 

[jcx]

Zener are pretty useless as regulators/references that low, LED can be found with a range of Vf that low

even series regular Si diode for n x 0.7 V or build a Vbe multiplier shunt regulator and set the R ratio for the V you want

 

[rayma]

Im trying to simulate a circuit with low voltage zeners but couldnt find anything in 2V range in LTspice
can anybody give me a LTSpice model for the low voltage zener please.

Try this instead: http://www.ti.com.cn/cn/lit/ds/symlink/lm4040-n.pdf

 

[bordodynov]

If you need a zener diode for unrealistic schemes. And your curiosity driven, then you can use the diode model
.subckt ShuntRef 1 2 Vref=1.22 rd=1 inom=1m imin=50u
d1 2 1 MyD
d2 1 2 dp
.model MyD D(Ron={rd} Roff={Vref/imin*1.05} Vfwd={Vref-rd*inom})
.model dp D(Ron=1 Roff=1G Vfwd=0.6)
.ends

In a real circuit using a chip TLV431 or a similar.

 

[jan.didden]

You can get far with a 2V battery with a series R. Probably 99% correct,surely for checking if your circuit is correct.

But in most sims you can adjust the Vz of a generic zener anyway.

Jan