The LM120 series are three-terminal negative regulators with a fixed output voltage of
−5V, −12V, and −15V, and up to 1.5A load current capability. Where other voltages are required, the
LM137 and LM137HV series provide an output voltage range of −1.2V to −47V.
The LM120 need only one external component—a compensation capacitor at the output, making
them easy to apply. Worst case specifications on output voltage deviation due to any combination of
line, load or temperature variation assure satisfactory system operation.
Exceptional effort has been made to make the LM120 Series immune to overload conditions.
The regulators have current limiting which is independent of temperature, combined with thermal
overload protection. Internal current limiting protects against momentary faults while thermal
shutdown prevents junction temperatures from exceeding safe limits during prolonged
Although primarily intended for fixed output voltage applications, the LM120 Series may
be programmed for higher output voltages with a simple resistive divider. The low quiescent drain
current of the devices allows this technique to be used with good regulation.
View datasheet View product folder