NIS5420MT4TXG

Current Regulation/Management Overview

The onsemi NIS5420MT4TXG is a SenseFET electronic fuse designed for high-reliability circuit protection. It operates within an input voltage range of 8V to 18V and delivers an output current of 4.6A with ±10% accuracy. The device integrates a power FET in a compact 10-WDFN (3x3) package, featuring a maximum height of 0.8mm. It supports surface mount installation and functions reliably across a temperature range of -40°C to 150°C junction temperature.

Current Regulation/Management Feature Summary

• Integrates overvoltage clamping to limit transient output voltages without shutting down the load.
• Includes thermal shutdown protection to prevent damage during overheating conditions.
• Features internal charge pump biasing and under-voltage lockout for stable operation.
• Provides programmable soft-start via external capacitor connection to control voltage slew rate.

Current Regulation/Management Applications

• Hard disk drive power supply protection
• General circuit overload and short-circuit protection
• High-reliability industrial electronics

Current Regulation/Management Procurement Notes

Verify the specific suffix MT4TXG against official datasheets to confirm the 4.6A current rating and 150°C junction temperature specification. Ensure compatibility with 10-WDFN footprint requirements. Confirm RoHS3 compliance status for your region. Check lead times as they may vary by distributor. Validate that the latching fault behavior aligns with system reset strategies.

Current Regulation/Management Selection Notes

Select this component when a compact, integrated solution is required for 12V systems needing robust overcurrent and overvoltage protection. The integrated power FET eliminates the need for external current sensing resistors, reducing board space. Consider the 150°C junction temperature rating for high-thermal environments. Verify that the 8V minimum operating voltage suits the system's brown-out conditions.

Current Regulation/Management Part Context

This part belongs to the NIS5420 series of electronic fuses from onsemi. The series is characterized by its integration of power switching and protection logic into a single small-footprint package. It is designed to replace traditional fusible links and PPTC devices, offering precise current limiting and repeatable fault recovery capabilities for sensitive loads.

Current Regulation/Management Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult official cross-reference tools or manufacturer support for verified alternatives.

Current Regulation/Management FAQ

How is the soft-start time controlled?

The soft-start time is controlled by connecting an external capacitor to the dv/dt pin. This allows the output voltage to rise gradually, typically within 2ms internally, preventing inrush current issues.

What is the function of the Enable/Fault pin?

The Enable/Fault pin serves as a three-state, bidirectional interface. It can be pulled low to disable the eFuse or used as a status indicator, where specific voltage levels indicate normal operation or thermal shutdown.

Does the device shut down during overvoltage events?

No, the device features an internal overvoltage clamp that limits the output voltage during transients without shutting down the equipment, ensuring continuous operation of the load circuit.