LM120 LM320 Series 3-Terminal Negative Regulators
November 1994
LM120 LM320 Series 3-Terminal Negative Regulators
Gene...
LM120 LM320 Series 3-Terminal Negative Regulators
November 1994
LM120 LM320 Series 3-Terminal Negative Regulators
General Description
The LM120 series are three-terminal negative regulators with a fixed output
voltage of b5V b12V and b15V and up to 1 5A load current capability Where other
voltages are required the LM137 and LM137HV series provide an output
voltage range of b1 2V to b47V The LM120 need only one external component a compensation capacitor at the output making them easy to apply Worst case guarantees 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 overloads 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
Features
Y Y Y Y
Y Y Y
Preset output
voltage error less than g 3% Preset current limit Internal thermal shutdown Operates with input-output
voltage differential down to 1V Excellent ripple rejection Low temperature dr...