STEF512GR

Current Regulation/Management Overview

The STEF512GR is an integrated dual electronic fuse designed for protecting circuitry on 5V and 12V rails from overcurrent and overvoltage events. It supports hot swap operations and inrush current control with adjustable start-up times via external soft-start capacitors. The device features two independent channels with fixed current limits of 3A for the 5V rail and 4A for the 12V rail. Integrated power FETs provide a low ON-resistance of 40 mΩ, minimizing voltage drop during normal operation. Additional protections include precise overvoltage clamping, input undervoltage lockout (UVLO), and latched-off thermal shutdown to disconnect the load during persistent anomalies.

Current Regulation/Management Feature Summary

• Dual independent eFuse channels for 5V and 12V rails within a single chip
• Adjustable output voltage slew-rate for controlled inrush current at startup
• Precise overvoltage clamp prevents load damage from power supply failures
• Latched-off thermal protection automatically opens internal switch during persistent overload

Current Regulation/Management Applications

• Hot swap applications requiring inrush current control
• Protection of 5V and 12V power rails in electronic systems
• Circuitry safeguarding against overcurrent and overvoltage events

Current Regulation/Management Procurement Notes

Verify the specific package type and marking code when ordering to ensure compatibility with your PCB footprint. Confirm that the fixed current limits of 3A and 4A align with your design requirements, as these values are factory-defined and cannot be adjusted externally. Ensure adequate thermal management is planned, as the device enters latched-off mode during thermal shutdown conditions.

Current Regulation/Management Selection Notes

Select this component when dual-channel protection for distinct voltage rails is required in a compact form factor. The adjustable soft-start feature makes it suitable for systems sensitive to inrush currents. Consider the 40 mΩ ON-resistance for efficiency-critical designs where minimal voltage drop is essential. Verify that the SAS disable pin functionality meets your safety architecture needs.

Current Regulation/Management Part Context

The STEF512GR belongs to STMicroelectronics' family of integrated electronic fuses, designed to replace traditional discrete fuse components. It consolidates protection functions for multiple voltage rails into a single SAS-8L package, reducing board space and simplifying design. This integration supports modern electronics requiring robust power management and reliable fault protection without increasing component count.

Current Regulation/Management Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.