LM78xxS

The LM78xxS is a series of three-terminal positive voltage regulators manufactured by Texas Instruments. The "xx" in the part number denotes the output voltage, with common variants including the LM7805S (5V), LM7809S (9V), and LM7812S (12V). These regulators are designed to provide a stable and regulated positive DC voltage from an unregulated input voltage. They are characterized by their simplicity of use, requiring only two external capacitors for stable operation in most applications.

These regulators feature internal current limiting and thermal shutdown, which protect the device from damage due to overcurrent or excessive temperature. The LM78xxS series is capable of supplying up to 1 Ampere of output current, making them suitable for a wide range of power supply and voltage regulation tasks. They are commonly found in consumer electronics, industrial control systems, and various other applications where a reliable regulated voltage is required. The "S" suffix typically indicates a specific package type, often a TO-220 style package, which allows for good thermal dissipation when used with a heatsink. The input voltage range is typically from a few volts above the output voltage up to a maximum of around 35V.