LM431BIM/NOPB

Voltage Reference Overview

The LM431BIM/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 1% 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 an 8-pin SOIC package, designed for surface mount applications.

Voltage Reference Feature Summary

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

Voltage Reference Applications

• Precision voltage reference sources in electronic circuits
• Programmable linear power supply regulation
• Battery management system monitoring

Voltage Reference Procurement Notes

Verify the specific suffix 'NOPB' indicates lead-free compliance and RoHS status as per manufacturer documentation. Confirm the 8-pin SOIC package dimensions match the target PCB footprint. Ensure the 1% accuracy grade meets the design requirements for the intended application environment.

Voltage Reference Selection Notes

Select this component when an adjustable shunt regulator is required in an 8-pin SOIC package. Consider the 100 mA current limit and 37 V maximum input voltage constraints. Evaluate the 97 ppm/°C temperature drift against the circuit's thermal stability needs compared to lower drift alternatives.

Voltage Reference Part Context

This part belongs to the LM431 series of adjustable precision Zener shunt regulators. It serves as a direct replacement for legacy National Semiconductor versions while adhering to modern environmental standards. The series provides a cost-effective solution for voltage referencing and regulation tasks in various industrial and consumer electronics.

Voltage Reference Replacement Considerations

LM431BIM3/NOPB is a documented equivalent variant within the same family.