LM431BIMX/NOPB

Voltage Reference Overview

The LM431BIMX/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 supports a maximum shunt current of 100 mA with a temperature coefficient of 97 ppm/°C. It functions reliably between -40°C and +85°C. Packaged in a SOT-23-3 surface-mount format, it serves as a high-performance reference solution for power management applications requiring stable voltage regulation.

Voltage Reference Feature Summary

• Provides adjustable precision voltage regulation via a three-terminal shunt architecture
• Delivers high initial accuracy for stable reference performance across operating conditions
• Supports wide input voltage ranges suitable for diverse circuit topologies

Voltage Reference Applications

• Precision voltage references in power supply circuits
• Voltage regulation in portable electronic devices
• Battery-powered equipment requiring stable reference voltages

Voltage Reference Procurement Notes

Verify the complete part number including the NOPB suffix to ensure RoHS compliance and lead-free status. Confirm the SOT-23-3 package type matches your PCB footprint requirements. Check the specific grade designation (B) for the required 1% initial accuracy tolerance. Ensure the operating temperature range meets your environmental specifications. Validate datasheet revisions for any updates to electrical characteristics or recommended operating conditions.

Voltage Reference Selection Notes

Select this component when a compact surface-mount adjustable reference is required. The 100 mA shunt current capability allows for direct driving of low-current loads without additional buffering. The 1% accuracy suits applications demanding tighter tolerances than standard Zener diodes. Consider the SOT-23-3 package for space-constrained designs. Evaluate thermal management needs based on the maximum shunt current and ambient temperature.

Voltage Reference Part Context

This device belongs to the LM431 family of adjustable precision shunt regulators from Texas Instruments. It shares functional similarities with other LM431 variants but differs in package and accuracy grade. The LM431 series is widely used as a voltage reference or error amplifier in switching power supplies. The NOPB suffix indicates a lead-free and RoHS-compliant version of the original LM431BIMX.

Voltage Reference Replacement Considerations

LM431BIM3/NOPB is a documented direct substitute offering identical electrical specifications and functionality.