NCV431ASNT1G

Overview

The NCV431ASNT1G is a low voltage precision adjustable shunt regulator from the TLV431 series, manufactured by onsemi. It features a programmable output voltage range of 1.24 V to 16 V and an initial reference accuracy of ±1.0% at 25 °C. The device operates within an ambient temperature range of -40 °C to 85 °C and supports a cathode current range of 0.1 mA to 20 mA. It exhibits a sharp low current turn-on characteristic with a dynamic output impedance of 0.25 Ω typical. The component is housed in a TSOP-5 package and is AEC-Q100 qualified.

Feature Summary

• Programmable output voltage range spanning from 1.24 V to 16 V using external resistors
• Guaranteed reference accuracy of ±1.0% at 25 °C for the A series
• Sharp low current turn-on characteristic suitable for precise regulation
• Low dynamic output impedance ensuring stable performance across operating currents

Applications

• Error amplifier for isolated low output voltage switching power supplies
• Adjustable voltage or current linear and switching power supplies
• Voltage monitoring circuits
• Current source and sink applications
• Low voltage Zener diode replacements requiring precision references

Procurement Notes

Verify that the ordering suffix matches the required package type, as the NCV prefix specifically indicates the TSOP-5 package configuration. Confirm automotive qualification requirements are met through the NCV designation, which denotes AEC-Q100 qualification and PPAP capability. Ensure the selected variant aligns with the specific accuracy grade needed for the application design.

Selection Notes

Select this component when a precision reference with a wide programmable voltage range is required in a compact surface-mount form factor. The NCV prefix ensures suitability for automotive environments due to its extended temperature range and qualification standards. Consider the ±1.0% tolerance if higher precision is not strictly necessary, as other series variants offer tighter tolerances.

Part Context

This part belongs to the TLV431 family of programmable shunt regulators, designed as high-performance alternatives to standard Zener diodes. The NCV prefix distinguishes it as an automotive-grade device, meeting specific site and control change requirements. It shares functional similarities with the SCV431 series but utilizes a different package style optimized for specific board space constraints.

Replacement Considerations

TLV431ASNT1G

FAQ

What is the maximum cathode-to-anode voltage for the NCV431ASNT1G?

The maximum cathode-to-anode voltage (VKA) is rated at 18 V under full operating ambient temperature conditions.

Does the NCV431ASNT1G require external compensation for stability?

Yes, when used in feedback loops such as in isolated switching power supplies, external capacitors are typically required for loop compensation to ensure stability.