LM431BCZ/NOPB

Voltage Reference Overview

The LM431BCZ/NOPB is a three-terminal adjustable precision shunt regulator manufactured by Texas Instruments. It operates within an output 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 1% and a temperature coefficient of 97 ppm/°C. It functions reliably across a minimum operating temperature of -40°C and a maximum of +85°C, utilizing an SMD/SMT installation style in an SOIC-8 package.

Voltage Reference Feature Summary

• Provides adjustable precise zener shunt regulation with guaranteed thermal stability across the full operational temperature range.
• Offers high initial accuracy for consistent reference voltage performance without requiring external trimming.
• Supports wide input voltage ranges up to 37 V with robust current handling capabilities.

Voltage Reference Applications

• Precision voltage references in power supply circuits
• Programmable linear regulators
• Comparator replacement applications

Voltage Reference Procurement Notes

Verify the specific suffix 'BCZ' against official Texas Instruments documentation to confirm exact tolerance grades and package variations. Ensure compatibility with RoHS standards as indicated by the NOPB designation. Cross-reference datasheet parameters such as temperature coefficients and accuracy classes before procurement to match design requirements precisely.

Voltage Reference Selection Notes

Select this component when a surface-mount adjustable shunt regulator with 1% initial accuracy is required. Consider the SOIC-8 package constraints and the 97 ppm/°C temperature coefficient for thermal stability needs. Evaluate the 100 mA current limit against load requirements to ensure adequate headroom for regulation tasks.

Voltage Reference Part Context

This part belongs to the LM431 family of adjustable precision shunt regulators from Texas Instruments. It serves as a direct replacement for legacy TL431 devices, offering improved performance metrics while maintaining pin-out compatibility. The NOPB suffix indicates lead-free construction compliant with environmental directives.

Voltage Reference Replacement Considerations

LM431ACM/NOPB offers higher accuracy (2%) but similar functionality. LM431CIM3/NOPB provides a smaller SOT-23-3 package option. Verify pin compatibility and thermal characteristics when substituting with these alternatives.