STMicroelectronics

L4940D2M5-TR  

Linear & Switching Voltage Regulators

L4940D2M5-TR Description

The L4940D2M5-TR is a linear voltage regulator designed by STMicroelectronics, offering a fixed 5V output voltage with a maximum output current of 1.5A. This regulator is housed in a D2PAK package, which is suitable for surface-mount applications. The device is designed to operate with an input voltage range up to 17V, ensuring a wide range of compatibility with various power sources. It features a low dropout voltage of 0.9V at 1.5A, which enhances efficiency and reduces power dissipation.

The L4940D2M5-TR includes several protection features such as over-temperature protection, reverse polarity protection, and short-circuit, protection ensuring robustness and reliability in demanding applications. With a quiescent current of 8 mA and a supply current of up to 50 mA, this regulator is designed for low-power consumption and high efficiency. The device also boasts a high power supply rejection ratio (PSRR) of 68dB at 120Hz, which helps in maintaining a stable output voltage under varying input conditions.

L4940D2M5-TR Features

• Fixed Output Voltage: 5V, ensuring stable power supply for various electronic devices.
• High Output Current: Capable of delivering up to 1.5A, suitable for applications requiring moderate to high current.
• Low Dropout Voltage: 0.9V at 1.5A, which improves efficiency and reduces power loss.
• Protection Features: Over-temperature, reverse polarity, and short-circuit protection ensure reliability and longevity.
• Low Quiescent Current: 8 mA, contributing to low power consumption.
• High PSRR: 68dB at 120Hz, providing excellent noise rejection and stable output.
• Surface Mount Package: D2PAK, ideal for compact and high-density designs.
• Compliance: ROHS3 compliant and REACH unaffected, ensuring environmental and regulatory standards are met.

L4940D2M5-TR Applications

The4 L940D2M5-TR is well-suited for a variety of applications where a stable and reliable power supply is essential. Its fixed 5V output and high current capability make it ideal for powering microcontrollers, digital signal processors, and other digital circuits. The low dropout voltage and high PSRR make it suitable for applications where input voltage fluctuations are common, such as in automotive electronics and industrial control systems.

Specific use cases include:

• Consumer Electronics: Powering devices like smartphones, tablets, and portable gaming consoles.
• Automotive Systems: Providing stable power to electronic control units (ECUs) and infotainment systems.
• Industrial Equipment: Ensuring reliable power supply for programmable logic controllers (PLCs) and other industrial automation devices.
• Telecommunications: Supplying power to base stations and other communication equipment.

Conclusion of L4940D2M5-TR

The L4940D2M5-TR from STMicroelectronics is a robust linear voltage regulator that offers a balance of high performance and reliability. Its fixed 5V output and 1.5A current capability make it suitable for a wide range of applications, while its low dropout voltage and high PSRR ensure efficient and stable operation. The inclusion of multiple protection features enhances its durability and makes it an ideal choice for demanding environments. Despite being marked as obsolete, the L4940D2M5-TR remains a viable option for applications where its specific features and performance benefits are required.

L4940D2M5-TR Documents

Download datasheets and manufacturer documentation for L4940D2M5-TR

Datasheets :

L4940 Series      

HTML Datasheet :

L4940 Series