Product Overview: LM3940IT-3.3

The LM3940IT-3.3 is a low dropout regulator (LDO) designed and manufactured by Texas Instruments, one of the leading companies in the semiconductor industry. This regulator is specifically engineered to convert a higher voltage to a lower voltage with minimal loss of power, making it an ideal choice for various electronic applications that require a stable and reliable 3.3V supply.

Key Features

• Output Voltage: The LM3940IT-3.3 provides a fixed output voltage of 3.3V, which is suitable for powering 3.3V logic in mixed 5V/3.3V systems.
• Dropout Voltage: With a low dropout voltage of typically 1V at a 1A load, it ensures efficient operation even when the input voltage is close to the output voltage.
• Current Capacity: It can supply up to 1A of output current, making it capable of handling moderate to high power requirements.
• Package: The device comes in a TO-220 package, known for its robustness and good thermal performance, making it suitable for through-hole mounting.
• Protection Features: It includes built-in protection features such as overcurrent protection and thermal shutdown, enhancing the safety and reliability of the application.

Applications

The LM3940IT-3.3 is versatile and can be used in a wide range of applications, including:

• Local on-card regulation for elimination of noise and distribution problems associated with single-point regulation.
• Powering 3.3V digital logic in systems that are predominantly 5V.
• Efficient linear post-regulation for switching power supplies.
• Battery-powered applications due to its low dropout feature, which maximizes the battery life.

Quality and Reliability

Texas Instruments is known for its commitment to quality, and the LM3940IT-3.3 is no exception. It is designed to meet the stringent requirements of the industrial and commercial markets, ensuring long-term reliability. Whether you are designing a sophisticated digital device or a simple power supply, the LM3940IT-3.3 is a dependable choice for your voltage regulation needs.

For detailed specifications and application notes, Texas Instruments provides extensive documentation available on their official website, allowing designers to fully understand and utilize this regulator in their projects.