STEF01FTR

Current Regulation/Management Overview

The STEF01FTR is a fully programmable universal electronic fuse (eFuse) from STMicroelectronics, designed for monitoring output current and input voltage on DC power lines. It operates within an input voltage range of 8 V to 48 V, with an absolute maximum rating of 55 V. The device features a typical continuous current of 4 A and an N-channel on-resistance of 30 mΩ. Key programmable parameters include an adjustable output clamp voltage (10 V to 52 V), programmable undervoltage lockout (UVLO), short-circuit current limit, and overload current limit. It supports adjustable soft-start time for in-rush current control during startup and hot-swap operations. The STEF01FTR offers selectable thermal latch or auto-retry protection modes and includes a gate driver pin for external reverse-current blocking MOSFETs. It is housed in an HTSSOP14 package and operates at junction temperatures from -40 °C to 125 °C.

Current Regulation/Management Feature Summary

• Fully programmable universal eFuse optimized for DC power line monitoring
• Adjustable output clamp voltage and programmable UVLO for flexible configuration
• Selectable thermal latch or auto-retry protection modes via dedicated pin
• Integrated gate driver for external reverse-current blocking MOSFET implementation

Current Regulation/Management Applications

• Hot-swap operations requiring controlled in-rush current management
• DC power distribution networks needing overcurrent and overvoltage protection
• Systems requiring programmable fault response and thermal protection strategies
• Applications necessitating reverse current blocking capabilities

Current Regulation/Management Procurement Notes

Verify the specific suffix 'FTR' indicates tape-and-reel packaging if required by assembly processes, as standard variants may differ. Confirm the HTSSOP14 package availability matches your PCB footprint requirements. Ensure design compatibility with the 8 V to 48 V operating range and 4 A continuous current limits. Check for updated datasheet revisions regarding electrical characteristics before finalizing procurement specifications.

Current Regulation/Management Selection Notes

Select the STEF01FTR when a fully programmable eFuse is needed for robust DC power protection. It is suitable for applications requiring precise control over overcurrent thresholds, soft-start timing, and thermal protection behavior. Consider this component for designs involving hot-swap functionality or where reverse current blocking is essential. Verify that the external components required for programming UVLO and clamp voltages fit within your system constraints.

Current Regulation/Management Part Context

The STEF01 belongs to STMicroelectronics' portfolio of smart power distribution solutions. It serves as a critical component for enhancing safety and reliability in DC power systems by replacing traditional fuses and discrete protection circuits. The device integrates advanced monitoring and protection features into a compact package, supporting modern power management architectures.

Current Regulation/Management Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Consult STMicroelectronics technical support for potential cross-reference options based on specific application requirements.

Current Regulation/Management FAQ

How is the thermal protection mode selected?

The thermal protection mode, either latch or auto-retry, is selectable via a dedicated pin on the device.

Can the STEF01FTR handle hot-swap operations?

Yes, the device features an adjustable turn-on time (soft-start) specifically useful for controlling in-rush current during startup and hot-swap operations.

What is the purpose of the gate driver pin?

The gate driver pin provides drive capability for an external power MOSFET to implement a reverse-current blocking circuit.