LM7912

The LM7912 is a linear voltage regulator IC manufactured by National Semiconductor, now part of Texas Instruments. It is part of the LM79XX series of negative voltage regulators. The LM7912 specifically provides a fixed output voltage of -12 volts. It is designed to be used in a wide variety of applications requiring a regulated negative voltage supply.

This regulator features thermal overload and short-circuit protection, which enhances its reliability and prevents damage during fault conditions. It requires minimal external components, typically just a couple of capacitors for stability. The input voltage range for the LM7912 is typically from -15V to -30V, with a maximum input voltage of -35V. The output current capability is generally up to 1.5A, depending on the specific package and heatsinking.

The LM7912 is available in several standard package types, including TO-220 and TO-3, which allow for adequate heatsinking when operating at higher power dissipation levels. It is a popular choice for applications such as power supplies for audio equipment, industrial controls, and other electronic circuits that require a stable negative voltage. Its ease of use and robust protection features make it a reliable component for many designs.