NCP431AVDR2G

Overview

The NCP431AVDR2G is a three-terminal programmable shunt regulator diode from onsemi, operating within an ambient temperature range of -40°C to +125°C. It features a typical reference input voltage tolerance of ±1% at 25°C and maintains stability across the full rated temperature range. The device supports a cathode current range of 40 µA to 100 mA with a typical dynamic impedance of 0.22 Ω. It utilizes an SOIC-8 package (D Suffix) and is supplied in tape and reel quantities of 2500 units.

Feature Summary

• Programmable output voltage capability extending up to 36 V using external resistors
• Low minimum operating current suitable for secondary regulators in switch-mode power supplies
• Temperature compensated operation over the full industrial extended temperature range
• Lead-free construction compliant with environmental standards

Applications

• Voltage adapters
• Switching power supply feedback loops
• Precision voltage references
• Battery chargers
• Instrumentation circuits

Procurement Notes

Verify the specific suffix 'AV' confirms the -40°C to +125°C temperature grade and 'DR2G' indicates the SOIC-8 tape and reel packaging configuration. Confirm that the ordering code matches the exact tolerance requirements for the intended application, as other suffixes denote different temperature ranges or package types. Ensure compatibility with the required assembly location and lot traceability if automotive qualification is necessary.

Selection Notes

Select this component when a wide operating temperature range is required compared to standard commercial variants. The low minimum cathode current makes it ideal for applications demanding extremely low no-load consumption in secondary side regulation. Consider the dynamic impedance characteristics for noise-sensitive designs and ensure adequate load capacitance is applied to maintain loop stability during transient conditions.

Part Context

This device belongs to the NCP431/NCP432 series of programmable precision references manufactured by onsemi. It serves as a direct replacement for traditional Zener diodes in various analog and digital circuitry. The series includes multiple variants differentiated by temperature grades and package styles, such as SOT-23 and TO-92, allowing flexibility in board space and thermal management requirements.

Replacement Considerations

NCP431BIDR2G

FAQ

What is the maximum cathode-to-anode voltage rating?

The absolute maximum rating for the cathode-to-anode voltage is 37 V.

How does the device handle stability with load capacitance?

Stability depends on the load capacitance and cathode current; designers should consult the stability boundary curves in the datasheet to determine appropriate compensation.