Texas Instruments

LM340T-5.0/LB01

LM340T-5.0/LB01 Description

The LM340T-5.0/LB01 is a linear voltage regulator designed by Texas Instruments, offering a fixed output voltage of 5V and a maximum output current of 1A. This device is housed in a TO-220-3 package, making it suitable for through-hole mounting. Despite being marked as obsolete, the LM340T-5.0/LB01 remains a reliable choice for applications requiring a stable power supply within its specified operating range.

Key technical specifications include a maximum input voltage of 35V, a dropout voltage of 2V at 1A, and a quiescent current of 8 mA. The regulator operates within a temperature range of 0°C to 125°C, ensuring robust performance in various environmental conditions. Additionally, it features over-temperature and short-circuit protection, enhancing its reliability and safety in practical applications.

LM340T-5.0/LB01 Features

• Fixed Output Voltage: The LM340T-5.0/LB01 provides a stable 5V output, ideal for applications requiring a precise and constant power supply.
• High Input Voltage Range: With a maximum input voltage of 35V, this regulator can handle a wide range of input voltages, making it versatile for various power supply designs.
• Low Dropout Voltage: At 2V dropout at 1A, the LM340T-5.0/LB01 ensures efficient power conversion even when the input voltage is close to the output voltage.
• Protection Features: Over-temperature and short-circuit protection mechanisms safeguard the device and connected circuits from damage, enhancing overall system reliability.
• Low Quiescent Current: The 8 mA quiescent current minimizes power consumption during operation, making it suitable for energy-efficient designs.
• Wide Operating Temperature Range: The regulator operates reliably from 0°C to 125°C, making it suitable for applications in diverse environments.
• Through-Hole Mounting: The TO-220-3 package allows for easy integration into through-hole PCB designs, facilitating straightforward assembly and maintenance.

LM340T-5.0/LB01 Applications

The LM340T-5.0/LB01 is well-suited for a variety of applications where a stable 5V power supply is required. Some specific use cases include:

• Consumer Electronics: Ideal for powering devices such as radios, small appliances, and portable electronics that require a stable 5V supply.
• Industrial Control Systems: Suitable for powering control modules and sensors in industrial environments, where reliability and stability are paramount.
• Automotive Applications: Given its wide operating temperature range, the regulator can be used in automotive electronics, such as dashboard systems and infotainment units.
• Telecommunications: Can be employed in communication equipment, such as modems and routers, to provide a stable power source.
• Power Supply Units: Useful in designing linear power supplies for laboratory and testing equipment.

Conclusion of LM340T-5.0/LB01

The LM340T-5.0/LB01, despite its obsolete status, remains a reliable and efficient linear voltage regulator for applications requiring a stable 5V output. Its low dropout voltage, wide input voltage range, and robust protection features make it a versatile choice for various electronic designs. While newer alternatives may offer additional features, the LM340T-5.0/LB01 continues to provide dependable performance in a compact and easy-to-integrate package. For engineers and designers in need of a tried-and-true 5V regulator, the LM340T-5.0/LB01 is a solid option to consider.