The L7809CV is a voltage regulator IC with a TO-220 package. It is a monolithic integrated circuit that is specifically designed to provide a stable, regulated 9V DC voltage output from a variable input voltage. The L7809CV can be used in a variety of applications where a stable 9V DC voltage is required, such as power supplies, battery chargers, and DC-DC converters. It has a wide input voltage range and can regulate input voltages from 10V to 22V. The L7809CV has a maximum output current of 1.5A, making it suitable for use in circuits that require a moderate amount of current. It is a three-terminal regulator, meaning it has a positive input, a negative input, and an output. It is commonly used in electronic circuits where a stable 9V voltage is required to power sensitive electronic components.

The L7809CV is a three-terminal positive regulators is available in TO-220, TO-220FP, TO-3, D²PAK and DPAK packages and several fixed output voltages, making it useful in a wide range of applications. These regulators can provide local on-card regulation, eliminating the distribution problems associated with single point regulation. Each type employs internal current limiting, thermal shut-down and safe area protection, making it essentially indestructible.