AZ431LAKTR-E1

Overview

The AZ431LAKTR-E1 is an adjustable precision shunt voltage reference manufactured by Diodes Incorporated. It operates within a cathode voltage range of 1.24 V to 18 V and provides an initial accuracy of 0.5%. The device features a typical temperature coefficient of 20 PPM/°C and supports a maximum cathode current of 100 mA with a minimum operating current of 100 µA. It is housed in a surface-mount SOT-23 package and functions across an extended temperature range from -40°C to +125°C.

Feature Summary

• Adjustable output voltage capability spanning from the internal reference level up to the maximum cathode voltage limit.
• High precision performance characterized by tight initial accuracy tolerance for stable reference applications.
• Low temperature coefficient ensures consistent voltage regulation across wide thermal variations.

Applications

• Precision voltage references in portable battery-powered equipment
• Current limiting and pass transistor drive in switching power supplies
• Programmable output control in linear regulators

Procurement Notes

Verify the specific suffix 'E1' against the manufacturer's latest documentation, as availability data indicates potential end-of-life status or transition to alternative suffixes like 'G1'. Confirm RoHS compliance details and ensure the sourcing channel provides valid traceability for this discontinued or transitioning component variant before finalizing procurement plans.

Selection Notes

Select this component when a low-cost, high-precision shunt regulator is required for voltages between 1.24 V and 18 V. The 0.5% accuracy and 20 PPM/°C temperature coefficient make it suitable for applications demanding better stability than standard Zener diodes but without the complexity of series regulators. Ensure the circuit design accommodates the minimum 100 µA cathode current requirement for proper regulation.

Part Context

This part belongs to the AZ431L family of adjustable shunt regulators from Diodes Incorporated. It serves as a direct replacement for traditional Zener diodes in many circuits, offering superior temperature stability and lower dynamic impedance. The 'L' designation typically denotes the specific accuracy grade and package configuration within the broader AZ431 product line.

Replacement Considerations

Public confirmed substitute part numbers include AZ431LBKTR-G1 and AZ431LANTR-G1. Verify pinout compatibility and electrical parameter alignment, particularly the accuracy grade and temperature coefficient, when substituting these variants.