Texas Instruments

LM2940CSX-9.0  

Linear & Switching Voltage Regulators

LM2940CSX-9.0 Description

The LM2940CSX-9.0 is a fixed output linear voltage regulator designed by Texas Instruments, offering a stable 9V output at a maximum current of 1A. This regulator is housed in a surface-mount DDPAK/TO263-3 package, making it suitable for a variety of applications where space efficiency and robust performance are critical. The LM2940CSX-9.0 is capable of operating within an input voltage range up to 26V, ensuring compatibility with a wide array of power sources. Its low dropout voltage of 0.8V at 1A ensures high efficiency even under low input-to-output voltage differentials.

LM2940CSX-9.0 Features

• Fixed Output Voltage: The LM2940CSX-9.0 provides a stable 9V output, ideal for applications requiring a consistent power supply.
• High Current Capability: With a maximum output current of 1A, this regulator can support demanding applications that require significant power.
• Low Dropout Voltage: At 0.8V @ 1A, the LM2940CSX-9.0 maintains high efficiency, reducing power loss and heat generation.
• Protection Features: The regulator includes over-current, over-temperature, reverse polarity, and short-circuit protection, enhancing reliability and durability.
• Low Quiescent Current: A quiescent current of 10 mA ensures minimal power consumption during standby operation.
• High PSRR: With a power supply rejection ratio (PSRR) of 64dB at 120Hz, the LM2940CSX-9.0 effectively filters out noise from the input power source.
• Wide Operating Temperature Range: The regulator operates reliably from 0°C to 125°C, making it suitable for industrial and automotive applications.
• Moisture Sensitivity Level: MSL 3 (168 Hours) ensures the LM2940CSX-9.0 is robust against moisture, enhancing its longevity in various environments.
• Mounting Type: Surface-mount technology (SMT) allows for compact and efficient PCB design.

LM2940CSX-9.0 Applications

The LM2940CSX-9.0 is well-suited for applications requiring a stable and efficient power supply. Its features make it ideal for:

• Industrial Equipment: Providing reliable power to control systems, sensors, and actuators.
• Automotive Electronics: Ensuring stable power supply to electronic control units (ECUs) and infotainment systems.
• Consumer Electronics: Powering devices such as routers, set-top boxes, and other appliances that require a stable 9V supply.
• Telecommunications: Supplying power to base stations, repeaters, and other communication equipment.
• Medical Devices: Ensuring stable power supply to critical medical equipment and monitoring devices.

Conclusion of LM2940CSX-9.0

The LM2940CSX-9.0 from Texas Instruments is a robust and efficient linear voltage regulator, offering a stable 9V output with a maximum current of 1A. Its low dropout voltage, comprehensive protection features, and wide operating temperature range make it a reliable choice for various industrial, automotive, and consumer applications. Despite being marked as obsolete, the LM2940CSX-9.0 remains a viable option for applications where its unique features and performance benefits are required.

LM2940CSX-9.0 Documents

Download datasheets and manufacturer documentation for LM2940CSX-9.0