AZ431AZ-BE1

Overview

The AZ431AZ-BE1 is a three-terminal adjustable precision shunt regulator manufactured by Diodes Incorporated. It operates within a cathode voltage range of VREF to 18V and supports a continuous sink current from 1mA to 100mA. The device features a typical reference voltage deviation of 4.5mV over the full temperature range (-40°C to +125°C) and maintains a low equivalent full-range temperature coefficient of 20PPM/°C. It utilizes a TO-92 package with bulk packing.

Feature Summary

• Programmable precise output voltage ranging from 2.5V to 18V
• Guaranteed thermal stability across the full operating temperature range
• Sharp turn-on characteristics with low output impedance
• High stability under capacitive load conditions

Applications

• Charger circuits
• Voltage adapters
• Switching power supplies
• Graphic cards
• Precision voltage references

Procurement Notes

Verify that the component matches the specific AZ431-B series designation, which indicates a maximum cathode voltage rating of 20V. Confirm the presence of the 'E1' suffix to ensure RoHS compliance. Ensure the physical package corresponds to the TO-92 form factor with bulk packaging as specified for this part number.

Selection Notes

Select this component when an adjustable shunt regulator is required with a maximum cathode voltage limit of 18V. It serves as a direct substitute for Zener diodes in applications demanding higher accuracy and lower temperature coefficients. Verify that the circuit design accommodates the minimum cathode current requirement of 0.4mA to 1.0mA for proper regulation.

Part Context

This component belongs to the AZ431 series of adjustable precision shunt regulators produced by Diodes Incorporated. The series includes variants with different voltage tolerances (0.4% and 0.8%) and maximum cathode voltage ratings (20V and 40V). The AZ431AZ-BE1 specifically denotes the 20V rated version with 0.8% tolerance in a TO-92 bulk package.

Replacement Considerations

AZ431AZ-BG1