STMicroelectronics

L4973V3.3

L4973V3.3 Description

The L4973V3.3 is a DC switching voltage regulator manufactured by STMicroelectronics, designed for applications requiring efficient power conversion. This through-hole mounted IC features a buck topology and offers a single adjustable output with a fixed minimum voltage of 0.5V, capable of reaching a maximum output of 50V. The L4973V3.3 is compliant with RoHS3 standards and has a moisture sensitivity level of 1, indicating unlimited storage time before reflow soldering is required.

L4973V3.3 Features

• Adjustable Output Voltage: The L4973V3.3 provides a flexible output voltage range, allowing for precise power regulation tailored to specific application needs.
• Robust Input Voltage Range: With an input voltage range from 8V to 55V, this regulator is suitable for a wide variety of power sources.
• High Output Current: Capable of delivering up to 3.5A, the L4973V3.3 is well-suited for applications demanding high current.
• Switching Frequency: Operating between 100kHz and 300kHz, this regulator offers efficient power conversion with minimal electromagnetic interference.
• Positive Output Configuration: The positive output configuration is ideal for applications where a positive voltage reference is necessary.
• REACH Unaffected Status: The L4973V3.3 is not affected by the Registration, Evaluation, Authorization, and Restriction of Chemicals (REACH) regulation, ensuring compliance with European chemical safety standards.

L4973V3.3 Applications

The L4973V3.3 is ideal for applications where high efficiency and adjustable output voltage are critical, such as:

• Power Supplies: For designing compact and efficient power supplies in industrial and consumer electronics.
• Battery Chargers: To manage battery charging with precise voltage regulation, enhancing battery life and performance.
• Telecommunications Equipment: In devices that require stable and reliable power, such as routers and base stations.
• Automotive Electronics: For in-vehicle electronics that demand high current and voltage stability.

Conclusion of L4973V3.3

While the L4973V3.3 is an obsolete product, it was a robust solution for applications requiring a high-current, adjustable output voltage regulator. Its features, such as a wide input voltage range, high output current, and positive output configuration, made it suitable for a variety of power management tasks. Although it may no longer be in production, understanding its specifications can help in identifying modern equivalents that offer similar performance benefits.