NCP431AILPRAG

Overview

The NCP431AILPRAG is a programmable precision shunt reference from onsemi, housed in a TO-92 (TO-226) package. It operates as a low temperature coefficient zener diode, adjustable from Vref to 36 V using two external resistors. The device features a cathode current range of 40 µA to 100 mA and a typical dynamic impedance of 0.22 Ω. It offers a reference input voltage tolerance of ±1% at 25°C and an equivalent full-range temperature coefficient of 50 ppm/°C. The unit supports through-hole mounting with an operating temperature range of -40°C to +85°C.

Feature Summary

• Programmable output voltage capability up to 36 V via external resistor divider
• Low minimum operating current enabling extremely low no-load consumption
• Temperature compensated for stable operation across the full rated ambient temperature range
• Low dynamic output impedance ensuring high stability in feedback loops

Applications

• Secondary regulators in switch-mode power supply adapters
• Precision voltage references for instrumentation
• Voltage monitoring circuits
• Charger control applications

Procurement Notes

Verify component authenticity against official onsemi documentation. Confirm the specific suffix 'LPRA' corresponds to the straight lead TO-92 tape and reel packaging format. Ensure the order quantity aligns with standard factory pack sizes. Check for any recent Product Change Notifications regarding manufacturing site or material updates.

Selection Notes

Select this component when a precise, adjustable shunt regulator is required in a through-hole package. The NCP431A variant provides a tighter initial accuracy compared to standard versions. Consider the low minimum cathode current requirement if designing for ultra-low standby power consumption in secondary side regulation.

Part Context

This part belongs to the NCP431/NCP432 series of integrated circuit voltage references. These devices serve as monolithic replacements for traditional Zener diodes in digital voltmeters and op-amp circuitry. The series includes variants with different tolerances and temperature ranges, such as the SC prefix automotive-grade options.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.