LM431BIM3X/NOPB

Voltage Reference Overview

The LM431BIM3X/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 features an initial accuracy of 1%. The device has a maximum shunt current of 100 mA and a temperature coefficient of 97 ppm/°C. It supports input voltages up to 37 V and functions between -40°C and +85°C. Packaged in a SOT-23-3 surface-mount format, it is supplied in cut tape or reel configurations.

Voltage Reference Feature Summary

• Adjustable reference output capability spanning from 2.495 V to 37 V
• High precision performance with 1% initial accuracy tolerance
• Robust thermal stability characterized by a 97 ppm/°C temperature coefficient

Voltage Reference Applications

• Precision voltage regulation circuits
• Portable equipment power management
• Battery-powered system references

Voltage Reference Procurement Notes

Verify the specific suffix configuration against official Texas Instruments documentation to ensure compatibility with required accuracy and packaging specifications. Confirm RoHS compliance status and lead times directly with authorized distributors prior to procurement. Ensure the selected package variant matches the intended PCB footprint and assembly process requirements for the LM431BIM3X/NOPB component.

Voltage Reference Selection Notes

Select this component when a compact surface-mount solution is required for adjustable voltage referencing applications. The SOT-23-3 package offers space efficiency for portable designs. Consider the 1% accuracy and 97 ppm/°C temperature coefficient for circuits demanding stable reference voltages across varying thermal conditions. Verify that the 100 mA shunt current rating meets the load requirements of the target application.

Voltage Reference Part Context

This part belongs to the LM431 series of adjustable precision Zener shunt regulators from Texas Instruments. It serves as a direct replacement for legacy non-RoHS versions, such as those without the NOPB suffix. The series is widely utilized in power supply feedback loops and voltage monitoring circuits where reliable, low-cost voltage referencing is essential for system stability.

Voltage Reference Replacement Considerations

LM431BIM3X is the non-RoHS equivalent predecessor. LM431AIM3X/NOPB offers higher 0.5% accuracy. LM431CIM3X/NOPB provides 0.5% accuracy in the same package.