STEF033APUR

Current Regulation/Management Overview

The STEF033APUR is an integrated electronic fuse designed for monitoring output current and input voltage on a 3.3 V rail. It protects downstream circuitry from overcurrent, overvoltage, and thermal faults. The device features controlled delay and turn-on times, with a typical continuous current of 3.6 A in the DFN package and 25 mΩ N-channel on-resistance. It includes an output clamp voltage of 4.5 V and operates within a junction temperature range of -40 °C to 125 °C. The component supports both latching and auto-retry modes, resetting via supply cycling or an Enable pin.

Current Regulation/Management Feature Summary

• Integrated protection against overcurrent, overvoltage, and thermal events with controlled response delays
• Auto-retry capability allows automatic power re-application upon load recovery after thermal faults
• Output voltage clamping prevents excessive voltage levels during input anomalies
• Fault signaling provided through a dedicated pin for board-monitoring integration

Current Regulation/Management Applications

• Protection of electronic circuits on 3.3 V power rails
• Overcurrent and overvoltage safeguarding in portable devices
• Thermal management in compact embedded systems

Current Regulation/Management Procurement Notes

Verify the specific suffix 'APUR' against the manufacturer's official datasheet to confirm package type (DFN10 3x3) and tape-and-reel specifications. Ensure the selected variant matches the required continuous current rating and thermal protection thresholds for your application design.

Current Regulation/Management Selection Notes

Choose this component when active protection against transient and persistent faults is required without manual fuse replacement. Consider the auto-retry feature if system availability is critical after temporary thermal or overload conditions. Verify compatibility with the 3.3 V rail and available control pins for enable and fault signaling.

Current Regulation/Management Part Context

The STEF033 belongs to STMicroelectronics' electronic fuse family, offering superior reliability compared to mechanical fuses by eliminating degradation after fault events. It integrates advanced protection features into a small footprint, suitable for space-constrained designs requiring robust power management and fault isolation capabilities.

Current Regulation/Management Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Consult STMicroelectronics for equivalent products with similar electrical characteristics and protection profiles.