STEF4SPUR

Current Regulation/Management Overview

The STEF4SPUR is an integrated electronic fuse and high-side current regulator manufactured by STMicroelectronics. It is designed for monitoring output current and input voltage, suitable for connection in series with 3.3V or 5V rails. The device operates within a supply voltage range of 2V to 10V. Key electrical specifications include a nominal operating voltage of 4V, a maximum current rating of 3.6A, and a power dissipation capability of 40mW. It features a typical threshold voltage of 4.5V. The component utilizes a surface-mount DFN package with dimensions of 3x3mm.

Current Regulation/Management Feature Summary

• Integrated electronic fuse functionality for reliable current regulation and management
• Optimized for simultaneous monitoring of output current and input voltage
• Designed for high-side protection applications on standard logic rails

Current Regulation/Management Applications

• Protection for 3.3V system rails
• Protection for 5V system rails
• Hot-swap voltage control circuits

Current Regulation/Management Procurement Notes

Verify the specific ordering suffix 'PUR' against the manufacturer's official documentation to confirm tape-and-reel packaging and lead-free status. Ensure the selected variant matches the required thermal performance and pinout configuration for the target PCB layout. Cross-reference the part number with the latest datasheet revision to confirm compliance with current environmental directives and functional specifications.

Current Regulation/Management Selection Notes

Select this component when integrated overcurrent protection and voltage monitoring are required for low-voltage DC rails. The device is appropriate for designs needing a compact solution for hot-swap applications or bus protection. Consider the 3.6A current limit and 40mW power dissipation limits during thermal design. Verify that the 2V to 10V input range aligns with the system's operational voltage profile.

Current Regulation/Management Part Context

The STEF4SPUR belongs to the STEF4S family of electronic fuses from STMicroelectronics. This series provides integrated solutions for current regulation and management in portable and industrial electronics. These devices replace traditional discrete fuses and current sense amplifiers, offering a simplified design approach for protecting sensitive loads from short circuits and overcurrent conditions.

Current Regulation/Management Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.