Texas Instruments

LM2940-50CKCSE3

LM2940-50CKCSE3 Description

The LM2940-50CKCSE3 is a fixed positive linear voltage regulator designed by Texas Instruments, offering a regulated output voltage of 5V with a maximum output current of 1A. This regulator is housed in a through-hole TO-220-3 package, making it suitable for a variety of applications requiring a robust and reliable power supply solution. The LM2940-50CKCSE3 features a maximum input voltage of 26V and a dropout voltage of 0.8V at 1A, ensuring efficient operation even under varying input conditions. It also includes comprehensive protection features such as over-current, over-temperature, reverse polarity, and short-circuit protection, enhancing its reliability and durability in demanding environments.

LM2940-50CKCSE3 Features

• Fixed Positive Output Configuration: Provides a stable 5V output, ideal for powering a wide range of electronic devices and circuits.
• High Efficiency: With a dropout voltage of only 0.8V at 1A, the LM2940-50CKCSE3 ensures minimal power loss and high efficiency, making it suitable for applications where power conservation is critical.
• Robust Protection Features: Over-current, over-temperature, reverse polarity, and short-circuit protection ensure the regulator can withstand various fault conditions, enhancing its reliability and longevity.
• Low Quiescent Current: A quiescent current of 15mA ensures minimal power consumption during standby, making it suitable for battery-powered and energy-efficient applications.
• Wide Operating Temperature Range: The LM2940-50CKCSE3 operates reliably over a temperature range of 0°C to 125°C, making it suitable for use in various industrial and automotive environments.
• High Power Supply Rejection Ratio (PSRR): With a PSRR of 72dB at 120Hz, the regulator effectively filters out noise from the input power supply, ensuring clean and stable output voltage.
• Compliance and Compatibility: The LM2940-50CKCSE3 is REACH unaffected and RoHS3 compliant, ensuring it meets the latest environmental and safety standards. It also has an ECCN classification of EAR99 and an HTSUS code of 8542.39.0001, facilitating international trade and regulatory compliance.

LM2940-50CKCSE3 Applications

The LM2940-50CKCSE3 is ideal for applications requiring a stable and reliable 5V power supply. Its robust features and wide operating temperature range make it suitable for:

• Industrial Control Systems: Providing stable power to PLCs, sensors, and actuators.
• Automotive Electronics: Powering ECUs, infotainment systems, and other automotive electronics.
• Consumer Electronics: Supplying power to devices such as routers, modems, and set-top boxes.
• Battery-Powered Devices: Ensuring efficient power management in portable devices and IoT sensors.
• Telecommunications: Powering base stations, repeaters, and other communication equipment.

Conclusion of LM2940-50CKCSE3

The LM2940-50CKCSE3 is a versatile and reliable linear voltage regulator that offers a stable 5V output with a maximum current of 1A. Its low dropout voltage, comprehensive protection features, and wide operating temperature range make it an excellent choice for a variety of industrial, automotive, and consumer applications. Despite being marked as obsolete, the LM2940-50CKCSE3 remains a valuable component for engineers and designers seeking a robust and efficient power supply solution.