LM431CIM3X/NOPB

Voltage Reference Overview

The LM431CIM3X/NOPB is an adjustable precision Zener shunt regulator manufactured by Texas Instruments. It operates within a voltage range of 2.495 V to 37 V and supports a maximum shunt current of 100 mA. The device features an initial accuracy of 0.5% and a temperature coefficient of 97 ppm/°C. It functions across a minimum operating temperature of -40°C and a maximum of +85°C. The component is housed in a SOT-23-3 surface-mount package and is supplied in reel or cut tape formats.

Voltage Reference Feature Summary

• Adjustable reference output capability spanning from 2.495 V up to 37 V for flexible circuit design.
• High initial accuracy of 0.5% ensures precise voltage regulation performance.
• Integrated thermal stability with a defined temperature coefficient for consistent operation.

Voltage Reference Applications

• Precision voltage references in analog signal processing circuits
• Programmable linear power supply regulation
• Comparator reference voltage generation

Voltage Reference Procurement Notes

Verify the specific suffix 'NOPB' confirms lead-free and RoHS compliance status as per manufacturer documentation. Confirm the 'X' designation indicates the correct reel packaging format for automated assembly processes. Ensure the SOT-23-3 footprint matches the target PCB layout constraints before finalizing procurement orders.

Voltage Reference Selection Notes

Select this component when an adjustable shunt regulator is required with tight initial accuracy tolerances. The SOT-23-3 package suits space-constrained surface-mount designs. Verify that the operating environment remains within the specified -40°C to +85°C temperature range to maintain the guaranteed 0.5% accuracy specification throughout the application lifecycle.

Voltage Reference Part Context

This part belongs to the LM431 series of adjustable precision Zener shunt regulators produced by Texas Instruments. It serves as a direct replacement for legacy LM431 variants while adhering to modern environmental standards indicated by the NOPB suffix. The device integrates a bandgap reference, error amplifier, and NPN transistor into a single compact semiconductor structure.

Voltage Reference Replacement Considerations

LM431CIM3/NOPB (Tube Packaging)

Voltage Reference FAQ

What is the maximum input voltage supported by this device?

The maximum series VREF input voltage is 37 V.

Does the NOPB suffix indicate a functional change?

No, the NOPB suffix denotes lead-free and RoHS compliance without altering the electrical function.