negative programmable reference voltage model recommendation

[john23]

Hello , I have this TL431 which makes a very good positive  reference voltage  12V to what ever we want in that range as shown in the photo.
Is there a similar model i could use to convert -12V into -2.5 in a similar amnner?
Thanks.

[Phil1977]

A shunt regulator as the TL431 works as well for negative voltages.

Here is an example: https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/898175/tl431-negative-reference-voltage-generation-using-tl431