LM431AIM3

Voltage Reference Overview

The LM431AIM3 is a precision adjustable shunt voltage reference manufactured by Texas Instruments. It operates within an input voltage range of 2.5 V to 37 V and provides an initial accuracy of ±0.5%. The device supports a maximum cathode current of 100 mA and features a temperature coefficient of 50 ppm/°C. Designed for industrial applications, it functions reliably between -40°C and +85°C. The component utilizes a surface-mount SOT-23-3 package, offering a compact solution for space-constrained circuit designs requiring stable voltage regulation.

Voltage Reference Feature Summary

• Provides high-precision voltage regulation with ±0.5% initial accuracy
• Supports wide operating input voltage range up to 37 V
• Capable of handling maximum cathode currents of 100 mA
• Operates reliably across the full industrial temperature range

Voltage Reference Applications

• Precision power supply regulation circuits
• Portable equipment battery monitoring systems
• Industrial process control instrumentation
• Voltage reference sources for analog-to-digital converters

Voltage Reference Procurement Notes

Verify the specific suffix configuration against official Texas Instruments documentation to ensure compatibility with required accuracy grades and packaging options. Confirm RoHS compliance status and lead times through authorized distributors. Ensure the selected variant matches the intended thermal and electrical requirements for the target application environment.

Voltage Reference Selection Notes

Select this component when high accuracy and low temperature drift are critical. The SOT-23-3 package suits space-limited designs. Compare against the LM431CIM3/NOPB for similar performance in active production. Consider the LMV431 series if lower operating voltages or reduced quiescent current are necessary for the specific system architecture.

Voltage Reference Part Context

This part belongs to the LM431 family of adjustable Zener shunt regulators. These devices function similarly to two-terminal adjustable Zener diodes but offer superior stability and accuracy. The LM431 series is widely used in feedback loops for switching regulators and linear power supplies to maintain precise output voltage levels under varying load conditions.

Voltage Reference Replacement Considerations

The LM431AIMX/NOPB is a confirmed direct replacement for discontinued variants within the same accuracy class. Verify pinout compatibility and thermal characteristics before substitution.