NCP431ACDR2G

Overview

The NCP431ACDR2G is a three-terminal programmable shunt regulator diode from onsemi, operating within an ambient temperature range of 0°C to 70°C. It features a reference input voltage tolerance of ±1% at 25°C and supports cathode currents ranging from 40 µA to 100 mA. The device provides a typical dynamic output impedance of 0.22 Ω and operates with a cathode-to-anode voltage up to 36 V.

Feature Summary

• Programmable output voltage capability extending up to 36 V using external resistors
• Low minimum operating current for efficient secondary regulation in switch-mode power supplies
• Temperature compensated operation across the full rated industrial temperature range

Applications

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

Procurement Notes

Verify the specific suffix 'CDR2G' corresponds to the SOIC-8 package and the 0°C to 70°C temperature grade. Confirm that the ±1% tolerance meets design requirements, as other variants offer tighter specifications. Ensure the component is sourced from authorized channels to guarantee authenticity and compliance with RoHS standards.

Selection Notes

Select this variant when an industrial temperature range of 0°C to 70°C is sufficient for the application environment. The ±1% initial accuracy is suitable for general-purpose regulation tasks. Consider higher-grade variants if wider temperature stability or tighter voltage tolerances are required for precision instrumentation applications.

Part Context

This component belongs to the NCP431/NCP432 series of programmable precision references. It serves as a low-cost alternative to traditional Zener diodes, offering superior temperature stability and lower dynamic impedance. The series is widely utilized in power management circuits requiring stable reference voltages derived from logic supplies.

Replacement Considerations

NCP431AIDR2G (Extended Temperature), SC431AIDR2G (Automotive Grade)