LMV431BIMFX/NOPB

Voltage Reference Overview

The LMV431BIMFX/NOPB is a low-voltage adjustable precision shunt voltage reference manufactured by Texas Instruments. It operates within a supply voltage range of 2.5 V to 30 V and features an internal reference voltage of 1.24 V. The device offers high accuracy with an initial tolerance of 0.5% and a temperature coefficient of 138 ppm/°C. It supports a maximum cathode current of 15 mA and functions reliably across an operating temperature range from -40°C to +85°C. Packaged in a compact SOT-23-3 surface-mount case, it is designed for space-constrained applications requiring stable voltage regulation.

Voltage Reference Feature Summary

• Adjustable output voltage capability ranging from the internal 1.24 V reference up to 30 V via external resistive divider
• High precision performance characterized by 0.5% initial tolerance for accurate voltage referencing
• Low-voltage operation optimized for single-supply systems starting at 2.5 V
• Compact SOT-23-3 surface-mount package design suitable for dense PCB layouts

Voltage Reference Applications

• Portable battery-powered equipment requiring precise voltage monitoring
• Microcontroller power supply supervision circuits
• Battery chargers and management systems
• General-purpose analog signal conditioning references

Voltage Reference Procurement Notes

Verify the specific suffix 'B' indicates the 0.5% tolerance grade distinct from standard variants. Confirm the 'MFX' designation corresponds to the SOT-23-3 tape-and-reel packaging format. Ensure compatibility with RoHS directives as indicated by the NOPB suffix. Cross-reference the manufacturer part number against official Texas Instruments documentation to validate electrical specifications before integration into production designs.

Voltage Reference Selection Notes

Select this component when application requirements demand tighter initial accuracy than standard 1% devices provide. The low-voltage start-up characteristic makes it suitable for systems where headroom is limited. Consider the thermal stability provided by the specified temperature coefficient for environments with moderate fluctuations. Evaluate the 15 mA current limit against load requirements to ensure adequate drive capability without exceeding maximum ratings.

Voltage Reference Part Context

This device belongs to the LMV431 family of low-voltage adjustable shunt regulators. It serves as a cost-effective alternative to traditional Zener diodes, offering superior temperature stability and lower dynamic impedance. The family includes variants with different tolerances and packages, such as the LMV431A (1% tolerance) and through-hole options like the LMV431IZ. It complements other Texas Instruments PMIC solutions for comprehensive power management.

Voltage Reference Replacement Considerations

Direct substitutes include the LMV431AIMFX/NOPB for 1% tolerance applications or the LMV431BIMF/NOPB for leaded versions. Verify pinout compatibility and electrical limits when swapping between series. Ensure replacement parts maintain the same operational voltage range and package dimensions for mechanical fit.