Adjustable voltage regulator 3 terminal national semiconductor lm337t 3 terminal adjustable negative regulator adjustable output voltage 12v to 37v output voltage single output 15a output current 0 to 125c to 220 case the lm337 is adjustable 3 terminal negative voltage regulator capable of supplying in excess of 15a temperature independent current limit internal thermal overload protection wide variety of applications including local on card regulation programmable output vo