FAN431AZXA

Overview

The FAN431AZXA is a programmable shunt regulator manufactured by Fairchild Semiconductor. It functions as a two-terminal voltage reference with an adjustable output voltage range spanning from 2.495V to 36V, set via external resistors. The device utilizes a TO-92 package with three pins and operates within a temperature range of -25°C to 85°C. It features low dynamic output impedance and fast turn-on response characteristics suitable for precision regulation applications.

Feature Summary

• Adjustable output voltage capability between 2.495V and 36V using two external resistors
• Low dynamic output impedance ensuring stable regulation performance
• Temperature compensated operation across the full rated operating temperature range

Applications

• Precision voltage references in power supply circuits
• Programmable shunt regulation for battery chargers
• Voltage monitoring and threshold detection systems

Procurement Notes

Verify component authenticity through authorized Fairchild Semiconductor distributors or certified suppliers. Confirm RoHS compliance status and lead-free designation prior to procurement. Ensure the TO-92 package variant matches design requirements. Validate that the specific suffix corresponds to the intended manufacturing lot and quality standards.

Selection Notes

Select this component when a compact, low-cost programmable shunt regulator is required for space-constrained designs. The TO-92 package facilitates through-hole mounting on standard PCBs. Consider the -25°C to 85°C operating range against environmental conditions. Evaluate the need for precise voltage setting capabilities over fixed reference alternatives.

Part Context

This part belongs to the FAN431 series of programmable shunt regulators produced by Fairchild Semiconductor. It serves as a versatile alternative to fixed voltage references, offering flexibility in circuit design through resistor-programmable output levels. The series is widely utilized in industrial and consumer electronics for stable voltage regulation tasks.

Replacement Considerations

Compatible substitutes include the TL431A and other generic programmable shunt regulators within the same voltage and current specifications. Verify pinout compatibility and thermal performance before substitution. Ensure replacement parts meet the same RoHS and lead-free requirements.