NCV431AIDR2G

Overview

The NCV431AIDR2G is a three-terminal programmable shunt regulator diode from onsemi, part of the NCV series designed for automotive and industrial applications requiring unique site and control change requirements. It operates as a low temperature coefficient zener, programmable from Vref to 36 V using two external resistors. The device features an 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% at 25 °C and an equivalent full-range temperature coefficient of 50 ppm/°C typical. Qualified under AEC-Q100 standards, it supports an extended operating temperature range of -40 °C to +125 °C.

Feature Summary

• Programmable output voltage adjustable from Vref to 36 V via external resistors
• AEC-Q100 qualified with PPAP capability for automotive and controlled supply chain requirements
• Temperature compensated operation across the full rated ambient temperature range
• Low output noise voltage and low dynamic output impedance

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
• Series pass regulators and linear ohmmeters

Procurement Notes

Verify that the specific ordering suffix DR2G corresponds to the SOIC-8 package and tape & reel shipping configuration. Confirm the 'NCV' prefix indicates compliance with automotive site and control change requirements. Ensure the 'AI' designation matches the required -40 °C to +125 °C operating temperature range and ±1.0% reference voltage tolerance specifications for the target application environment.

Selection Notes

Select this component when a stable, programmable reference voltage is needed within a wide operating temperature range. The NCV prefix is essential for designs requiring automotive-grade supply chain controls and AEC-Q100 qualification. Consider the 1.0 mA minimum cathode current for regulation when designing bias networks. Evaluate stability boundary conditions regarding load capacitance if used in feedback loops or high-current shunt configurations.

Part Context

This device belongs to the TL431 family of programmable precision references manufactured by onsemi. The NCV prefix distinguishes it as a variant meeting specific automotive quality and manufacturing site requirements. It serves as a direct replacement for standard TL431 devices in applications demanding higher reliability standards or specific supply chain traceability protocols defined by the NCV series designation.

Replacement Considerations

Standard TL431AIDR2G may be considered if automotive-specific site controls are not required. Other variants within the TL431 family offer different temperature ranges or tolerances but lack the NCV prefix qualifications.