L78M09CV (L7809CV) TO-220 Linear Voltage Regulator

Description

• Voltage Regulation: The “78” series voltage regulators, including the L78M09CV, are known for their ability to regulate the output voltage to a fixed value. In this case, it provides a regulated 9 volts output.
• Package Type: The “TO-220” package is a standard through-hole package commonly used for voltage regulators. It has a metal tab that can be used for heat dissipation when mounted on a suitable heatsink.
• Input Voltage Range: The L78M09CV typically requires an input voltage higher than the desired output voltage. It can handle input voltages from a few volts above 9V up to a maximum voltage specified in the datasheet (commonly around 35V to 40V for this type).
• Output Current: The maximum output current the L78M09CV can supply is determined by the package and its ability to dissipate heat. The specific output current depends on factors like the input voltage and thermal management. Commonly, it can handle currents up to 500mA or 1A, but the exact value may vary depending on the manufacturer and package.
• Regulation: It offers a fixed voltage output, which means it maintains the output voltage close to 9V even when there are variations in the input voltage and load conditions.
• Applications: Voltage regulators like the L78M09CV are used in a wide range of applications, including powering digital and analog circuits, microcontrollers, sensors, and other electronic components.
• Heat Dissipation: For high-current applications, or when the input voltage is significantly higher than the output voltage, a heatsink may be required to dissipate heat and prevent overheating of the regulator.
• Output Protection: It may have protection features such as over-temperature shutdown and over-current protection.
• Pin Configuration: The component typically has three pins: input (Vin), ground (GND), and output (Vout).
• Use of Decoupling Capacitors: It is common practice to place decoupling capacitors (typically in the range of 100nF to 10µF) at the input and output to stabilize the regulator and reduce noise.