LM431CIM-TI

Voltage Reference Overview

The LM431CIM-TI is a three-terminal adjustable precision Zener shunt regulator manufactured by Texas Instruments. It provides an output voltage range from 2.495 V to 37 V with initial accuracy options of 0.5%, 1%, or 2%. The device features temperature compensation for stable operation across the -40°C to +85°C industrial temperature range. It operates with a maximum shunt current of 100 mA and supports input voltages up to 37 V. Packaged in a compact SOT-23 (DBZ) surface-mount format, it serves as a cost-effective reference solution for power management applications requiring precise voltage regulation.

Voltage Reference Feature Summary

• Three-terminal adjustable precision Zener shunt regulator architecture
• Temperature compensated for stability over the entire operating range
• Available in multiple accuracy grades including 0.5% and 1%
• Compact SOT-23 surface-mount package design

Voltage Reference Applications

• Precision voltage references in power supply circuits
• Programmable linear regulators
• Battery charging control systems
• Voltage monitoring and threshold detection

Voltage Reference Procurement Notes

Verify that the specific suffix indicates the correct accuracy grade and packaging configuration required for your design. Confirm RoHS compliance status through official manufacturer documentation. Ensure the ordering part number matches the exact tolerance and tape-and-reel specifications needed for production assembly processes.

Voltage Reference Selection Notes

Select this component when a low-cost, adjustable shunt regulator is required for feedback loops or reference voltages. Consider the SOT-23 package size constraints and thermal dissipation capabilities relative to the expected shunt current load. Evaluate the necessary accuracy grade against system requirements to optimize bill-of-materials costs while maintaining performance stability.

Voltage Reference Part Context

This device belongs to the LM431 family of adjustable precision Zener shunt regulators. It functions similarly to standard Zener diodes but offers significantly improved temperature stability and lower dynamic impedance. The LM431 series is widely used in general-purpose electronics where reliable voltage referencing is critical for circuit operation and protection.

Voltage Reference Replacement Considerations

Compatible substitutes include LM431AIMX/NOPB and LM431ACMX/NOPB for equivalent SOT-23 packages. For through-hole requirements, TO-92 variants such as LM431AI are available. Verify pinout compatibility and electrical parameters before substitution.