NCV431AIDMR2G

Overview

The NCV431AIDMR2G is a three-terminal programmable shunt regulator diode from the TL431 family, manufactured by onsemi. It operates as a low temperature coefficient zener reference, programmable from Vref to 36 V using two external resistors. The device features a wide operating current range of 1.0 mA to 100 mA with a typical dynamic impedance of 0.22 Ω. It offers a voltage reference tolerance of ±1.0% and an equivalent full-range temperature coefficient of 50 ppm/°C typical. Qualified under AEC-Q100 standards, it supports an extended operating temperature range from -40 °C to +125 °C and is housed in a Micro8 package.

Feature Summary

• Programmable output voltage capability up to 36 V using external resistors
• AEC-Q100 qualified for automotive applications requiring unique site and control change requirements
• Temperature compensated operation across the full rated ambient temperature range
• Low dynamic output impedance and low output noise voltage characteristics

Applications

• Feedback control for driving optocouplers in power supplies
• Digital voltmeters and precision measurement instrumentation
• Voltage monitoring circuits with defined upper and lower limits
• Constant current sources and sinks for LED or battery charging
• Series pass regulators and high-efficiency step-down switching converters

Procurement Notes

Verify that the ordering suffix DMR2G corresponds to the Micro8 package and tape & reel shipping configuration. Confirm the NCV prefix indicates compliance with automotive-specific site and control change requirements. Ensure the selected variant matches the required -40 °C to +125 °C operating temperature range for the target application environment.

Selection Notes

Select this component when a precise, adjustable voltage reference is needed within a shunt regulator topology. The NCV prefix is essential for designs targeting automotive markets due to its qualification status. Consider the Micro8 package dimensions if board space is constrained. Verify stability boundary conditions regarding load capacitance and cathode current to ensure loop stability in feedback applications.

Part Context

This device belongs to the TL431 series of programmable precision references, serving as a monolithic IC replacement for traditional Zener diodes. The NCV prefix distinguishes it as part of onsemi's portfolio for automotive and other applications requiring specific quality and supply chain controls. It provides a stable 2.5 V internal reference point to facilitate accurate voltage scaling via external resistor networks.

Replacement Considerations

Direct functional equivalents include the TL431AIDMR2G and SCV431AIDMR2G. These parts share identical electrical specifications and pinouts but differ in prefix designation related to manufacturing site and qualification standards.