LM431BCM3/NOPB

Voltage Reference Overview

The LM431BCM3/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 0.5%. The device has a maximum shunt current of 100 mA and a temperature coefficient of 97 ppm/°C. It is housed in a SOT-23-3 surface-mount package and functions across a temperature range of -40°C to +85°C.

Voltage Reference Feature Summary

• Provides adjustable reference voltage functionality with high precision.
• Designed for surface-mount integration via compact SOT-23-3 packaging.
• Capable of handling up to 100 mA shunt current for regulation tasks.

Voltage Reference Applications

• Precision voltage reference circuits
• Adjustable power supply output regulation
• Comparator reference voltage generation

Voltage Reference Procurement Notes

Verify the specific suffix 'M3' against the manufacturer's official documentation to confirm pinout compatibility and package dimensions, as variations exist within the LM431 family. Ensure the 'NOPB' designation aligns with current RoHS compliance requirements for your target market. Cross-reference the datasheet revision date to validate electrical characteristics against your design specifications.

Voltage Reference Selection Notes

Select this component when a low-cost, high-accuracy adjustable shunt regulator is required in a small surface-mount footprint. The 0.5% initial accuracy makes it suitable for applications demanding tighter tolerance than standard Zener diodes. Consider the 100 mA current capability relative to the load requirements and thermal dissipation constraints inherent to the SOT-23-3 package.

Voltage Reference Part Context

This part belongs to the LM431 series of adjustable precision Zener shunt regulators from Texas Instruments. It serves as a drop-in replacement for traditional fixed-voltage Zener diodes in many circuit designs, offering superior stability and adjustability. The series is widely used in industrial and consumer electronics for voltage monitoring and regulation.

Voltage Reference Replacement Considerations

LM431BCM3X/NOPB is listed as a related variant in public databases. Verify pinout and electrical parameters before substitution.