NCV431BVDR2G

Overview

The NCV431BVDR2G is a three-terminal programmable shunt regulator diode from onsemi, part of the NCV431B series. It operates as a low temperature coefficient zener reference programmable from Vref to 36 V using two external resistors. The device features a voltage reference tolerance of ±0.4% typical at 25 °C and supports a sink current range of 1.0 mA to 100 mA. It exhibits a typical dynamic output impedance of 0.22 Ω and an equivalent full-range temperature coefficient of 50 ppm/°C. Designed for extended industrial and automotive environments, it functions within an ambient temperature range of −40 °C to +125 °C.

Feature Summary

• AEC-Q100 qualified with PPAP capability for automotive applications requiring unique site and control change requirements
• Temperature compensated operation across the full rated operating temperature range
• Low output noise voltage characteristics suitable for precision analog circuits
• Pb-Free, Halogen Free/BFR Free, and RoHS compliant packaging

Applications

• Feedback control for driving optocouplers in power supplies
• Digital voltmeters and precision measurement instrumentation
• Voltage monitor circuits with defined upper and lower limits
• Constant current sources and sinks for LED or battery charging

Procurement Notes

Verify that the ordering suffix DR2G corresponds to the SOIC-8 package and tape & reel shipping configuration. Confirm the NCV prefix indicates compliance with specific automotive site and control change requirements distinct from standard commercial variants. Ensure the B series designation matches the required ±0.4% voltage reference tolerance specification for the target design.

Selection Notes

Select this component when an adjustable shunt regulator with high precision (±0.4%) is required over a wide temperature range. The NCV prefix is necessary for projects demanding AEC-Q100 qualification and PPAP documentation. Consider the 100 mA maximum cathode current limit when designing load conditions. Verify stability boundary conditions if significant load capacitance is present in the circuit topology.

Part Context

This device belongs to the TL431 family of programmable precision references manufactured by onsemi. The NCV prefix specifically denotes automotive-grade devices that meet stricter quality and supply chain controls compared to standard TL431 parts. The BV suffix identifies the B-series tolerance variant with extended temperature capabilities, distinguishing it from the AI or AC series found in the same datasheet.

Replacement Considerations

TL431BVDR2G serves as a direct functional replacement for non-automotive TL431BVDR2G units where AEC-Q100 qualification is not mandatory. For general purpose replacements, TL431ACDR2G or TL431BCDR2G may be considered if temperature range and tolerance specifications align with system requirements.