LM431BCMX/NOPB

Voltage Reference Overview

The LM431BCMX/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 supports a maximum input voltage of 37 V and functions within a temperature range of -40°C to +85°C. The component is housed in an SOT-23 package.

Voltage Reference Feature Summary

• Provides adjustable reference voltage functionality with high precision.
• Operates as a shunt regulator for stable voltage control.

Voltage Reference Applications

• Voltage reference circuits
• Adjustable power supplies
• Battery chargers

Voltage Reference Procurement Notes

Verify the specific suffix 'NOPB' indicates compliance with RoHS standards and absence of hazardous substances. Confirm the 'CMX' designation corresponds to the SOT-23 surface-mount package type. Ensure the 'BC' grade matches the required 0.5% initial accuracy specification for the design. Cross-reference the manufacturer part number with official Texas Instruments documentation to validate availability and lead times.

Voltage Reference Selection Notes

Select this component when a compact surface-mount solution is required for precision voltage referencing. The 0.5% accuracy suits applications demanding tighter tolerances than standard variants. Consider the SOT-23 footprint for space-constrained PCB layouts. Evaluate the 100 mA shunt current capability against load requirements to ensure adequate regulation margin under varying conditions.

Voltage Reference Part Context

This part belongs to the LM431 family of adjustable precision Zener shunt regulators from Texas Instruments. It serves as a semiconductor alternative to traditional discrete Zener diodes, offering superior performance in terms of accuracy and temperature stability. The family includes various packages and accuracy grades to support diverse industrial and commercial electronic designs.

Voltage Reference Replacement Considerations

LM431ACMX/NOPB offers 2% accuracy; LM431CIMX/NOPB provides 0.5% accuracy in the same package.