Maxim Integrated, MAX686EEE+T, Regulators, References, Voltage References

 A full selection of programmable shunt regulators to design a shunt voltage regulator, adjustable, linear, low voltage shunt regulator or any other type of circuit that may require a shunt regulator.

https://www.futureelectronics.com/c/semiconductors/analog--regulators-reference--voltage-references/products