The LM104 series are precision voltage regulators which can be programmed by a single external resistor to supply any voltage from 40V down to zero while operating from a single unregulated supply They can also provide 0 01-percent regulation in circuits using a separate floating bias supply where the output voltage is limited only by the breakdown of external pass transistors Although designed primarily as linear series regulators the circuits can be used as switching regulators current regulators or in a number of other control applications Typical performance characteristics are Y Subsurface zener reference