LM431CIMX

Voltage Reference Overview

The LM431CIMX is a three-terminal adjustable shunt regulator manufactured by Texas Instruments. It operates within an output voltage range of 2.495 V to 37 V and supports a maximum cathode current of 100 mA. The device features an initial accuracy of 0.5% and a temperature coefficient of 97 ppm/°C. It functions with a maximum reference input voltage of 37 V and operates reliably across a temperature range from -40°C to +85°C. The component is housed in a SOT-23-3 surface-mount package.

Voltage Reference Feature Summary

• Provides precise adjustable voltage regulation via a three-terminal shunt architecture.
• Ensures stable performance with guaranteed thermal stability across the full operating temperature range.
• Offers high initial accuracy for reliable reference applications.

Voltage Reference Applications

• Precision voltage references
• Programmable power supplies
• Battery chargers

Voltage Reference Procurement Notes

Verify the specific suffix against the manufacturer's official documentation to confirm pinout compatibility and electrical tolerances. Ensure the ordering code matches the required package style and temperature grade. Cross-reference the datasheet revision date to validate parameter consistency before integration into design specifications.

Voltage Reference Selection Notes

Select this component when a low-cost, adjustable shunt regulator is required for space-constrained designs utilizing the SOT-23-3 package. Consider the 0.5% initial accuracy and 97 ppm/°C temperature coefficient for applications demanding moderate precision. Verify that the 100 mA cathode current capability meets the load requirements of the target circuit topology.

Voltage Reference Part Context

This part belongs to the LM431 family of adjustable precision Zener shunt regulators. It serves as a direct functional replacement for industry-standard TL431 devices, offering equivalent electrical characteristics while providing Texas Instruments' specific manufacturing quality and packaging options for surface-mount assembly processes.

Voltage Reference Replacement Considerations

The LM431CIMX is functionally compatible with the TL431 series. Verify pinout alignment and ensure the substitute part meets the same voltage and current ratings for seamless integration.