NCV8450STT3G

Overview

The NCV8450STT3G is a single-channel high-side power switch IC from onsemi, designed for automotive and industrial load distribution. It operates with a supply voltage range of 5 V to 34 V and supports a continuous output current of 500 mA. The device features a maximum on-resistance of 1 Ohm and includes integrated protection mechanisms such as fixed current limiting, over-temperature shutdown, and over-voltage protection. It utilizes an open/switch interface and offers automatic restart functionality upon fault clearance. Packaged in a SOT-223-4 surface-mount case, it is qualified to AEC-Q101 standards and functions within a junction temperature range of -40°C to +150°C.

Feature Summary

• Integrated high-side driver with non-inverting open/switch control interface
• Built-in self-protection against over-current, thermal overload, and over-voltage conditions
• Automatic restart capability following fault event resolution
• Automotive-grade reliability compliant with AEC-Q101 qualification standards

Applications

• Automotive lighting systems including interior, exterior, and signal lamps
• Power distribution units for peripheral loads in vehicle electronics
• Industrial motor control circuits requiring protected switching
• General purpose load switching in harsh environment applications

Procurement Notes

Verify the specific suffix 'STT3G' matches the required tape-and-reel packaging quantity and RoHS compliance status. Confirm AEC-Q101 certification requirements align with target automotive or industrial specifications. Ensure the SOT-223-4 footprint matches the PCB design constraints. Check for any recent product change notices affecting pinout or electrical characteristics before finalizing procurement.

Selection Notes

Select this component when a single-channel high-side switch with moderate current capacity is required. It is suitable for applications needing integrated fault protection without external components. Consider the 1 Ohm on-resistance for power dissipation calculations. Verify that the 500 mA output current meets the load requirements. The AEC-Q101 qualification makes it appropriate for automotive environments where reliability is critical.

Part Context

This part belongs to the NCV8450 series of high-side switches from onsemi. It is functionally similar to the NCV8452 but may differ in specific electrical parameters or package options. The series is designed for robust load management in automotive and industrial sectors. Other variants in the family offer different channel counts or current ratings.

Replacement Considerations

The NCV8450ASTT3G is a verified alternative within the same series. Verify compatibility regarding AEC-Q100 vs AEC-Q101 qualification levels if strict automotive grade adherence is required. Ensure pinout and thermal performance remain consistent for direct replacement.