STEF05LAPUR

Current Regulation/Management Overview

The STEF05LAPUR is a hot-swap voltage controller and electronic fuse designed for 5 V lines by STMicroelectronics. It operates within a supply voltage range of 4.5 V to 8 V, with an input voltage window of 3.1 V to 10 V. The device supports a continuous output current of 3.6 A and features a typical N-channel on-resistance of 40 mΩ in the DFN package. It functions as an integrated solution for monitoring output current and input voltage, providing protection against overcurrent and short-circuit conditions while enabling safe insertion and removal of hot-pluggable boards.

Current Regulation/Management Feature Summary

• Integrated electronic fuse functionality for monitoring output current and input voltage on 5 V rails
• Hot-swap capability allowing safe board insertion and removal without system disruption
• Built-in protection mechanisms including overcurrent, short-circuit, and reverse polarity defense

Current Regulation/Management Applications

• Protection of 5 V power distribution lines in industrial systems
• Hot-pluggable interface circuits requiring safe insertion and removal
• Electronic fuse implementation for board-level power management

Current Regulation/Management Procurement Notes

Verify that the specific suffix 'A' corresponds to the intended tape and reel packaging configuration as defined in the official datasheet. Confirm that the 10-VFDFN exposed pad package matches the thermal and mechanical requirements of the target PCB layout. Ensure compatibility with the specified operating temperature range of -40°C to +125°C for the application environment. Cross-reference the RoHS compliance status with current regulatory standards before finalizing procurement.

Current Regulation/Management Selection Notes

Select this component when a dedicated electronic fuse is required for 5 V lines with high current handling capabilities up to 3.6 A. The choice is appropriate for designs needing integrated hot-swap control and comprehensive fault protection in a compact surface-mount package. Consider the 40 mΩ on-resistance for efficiency calculations and verify that the 10-DFN footprint fits the available board space constraints.

Current Regulation/Management Part Context

The STEF05LAPUR belongs to the STEF05L series of hot-swap voltage controllers from STMicroelectronics. This series is specifically engineered for protecting low-voltage DC buses, particularly 5 V lines, in complex electronic systems. The part integrates power switches and control logic to manage power delivery safely during dynamic connection events.

Current Regulation/Management Replacement Considerations

Public confirmed substitute part numbers are not provided in the available documentation. Verify pinout and electrical specifications carefully if considering alternative electronic fuses from other manufacturers.