FAN431AZXA_F081

Overview

The FAN431AZXA_F081 is a programmable precision shunt regulator manufactured by onsemi. It functions as a two-terminal voltage reference with an internal reference voltage of 2.5V. The output voltage can be set to any value between 2.495V and 36V using two external resistors. The device features a typical initial tolerance of 0.15% and operates within a temperature range of -25°C to 85°C. It is housed in a TO-92 package with three pins.

Feature Summary

• Programmable precise output voltage from 2.5V to 36V
• Very accurate reference voltage with low temperature deviation
• Low dynamic output resistance for stable performance

Applications

• Charger voltage regulation
• Power adapter circuits
• Battery charging systems

Procurement Notes

Verify the manufacturer designation, as the part number prefix 'FAN' is historically associated with Fairchild Semiconductor. Confirm that onsemi has assumed distribution or production rights for this specific legacy part number. Ensure the suffix '_F081' matches the required tape and reel or packaging specification if applicable, although the TO-92 package typically implies through-hole mounting rather than standard surface-mount reels.

Selection Notes

Select this component when a low-cost, high-accuracy programmable shunt regulator is required for linear power supply applications. It serves as a direct alternative to other 2.5V reference-based shunt regulators like the TL431 family. Consider the TO-92 package constraints for board space and thermal dissipation requirements compared to SOT-23 alternatives.

Part Context

This component belongs to the class of adjustable precision shunt regulators. These devices are widely used as voltage references in switching power supplies and linear regulators. The FAN431 series provides a cost-effective solution for setting feedback voltages in DC-DC converters and battery chargers, offering stability under capacitive loads.