LMV431CZ

Voltage Reference Overview

The LMV431CZ is a two-terminal adjustable precision shunt voltage reference manufactured by National Semiconductor. It provides an adjustable output voltage ranging from the internal reference of 1.24 V up to 30 V. The device operates within a supply voltage range of 2.5 V to 36 V and supports a cathode current up to 100 mA. It features a low temperature coefficient of 50 ppm/°C and is housed in a TO-92-3 package.

Voltage Reference Feature Summary

• Adjustable output voltage capability spanning from 1.24 V to 30 V
• Low temperature coefficient for stable performance across operating ranges
• High current drive capacity supporting loads up to 100 mA

Voltage Reference Applications

• Portable equipment power management
• Battery-operated systems requiring precise voltage regulation
• General-purpose voltage references in analog circuits

Voltage Reference Procurement Notes

Verify the manufacturer designation, as Texas Instruments acquired National Semiconductor's analog portfolio. Confirm that the specific part number corresponds to the legacy NS version rather than a TI rebranding if sourcing from third-party distributors. Ensure the package type matches the required TO-92-3 form factor for your PCB layout.

Voltage Reference Selection Notes

Select this component when a low-cost, through-hole adjustable shunt regulator is required for applications needing up to 100 mA of load current. It is suitable for designs where a standard Zener diode lacks sufficient accuracy or temperature stability. Consider the TO-92-3 package constraints regarding thermal dissipation and board space availability.

Voltage Reference Part Context

This component belongs to the LM431 family of adjustable precision shunt regulators. While the LM431 typically operates at higher voltages (up to 36 V with different characteristics), the LMV431 variant is optimized for lower voltage operation starting at 2.5 V. The 'CZ' suffix indicates the specific TO-92-3 plastic package configuration used for through-hole mounting.

Voltage Reference Replacement Considerations

• LMV431ACZ
• LMV431BCZ

Voltage Reference FAQ

What is the minimum operating voltage for the LMV431CZ?

The device requires a minimum supply voltage of 2.5 V to function correctly.

Can the LMV431CZ replace a standard Zener diode?

Yes, it serves as a high-precision alternative to standard Zener diodes, offering better accuracy and temperature stability.