SPX431LN-L/TR

Overview

The SPX431LN-L/TR is a three-terminal adjustable shunt voltage reference manufactured by MaxLinear. It provides a highly accurate bandgap reference and functions as an open-loop error amplifier. The device operates within an input voltage range of 2.5V to 20V, delivering a cathode current up to 100mA. It features an initial accuracy of 1% and a temperature coefficient of 50ppm/°C. The component supports an operating temperature range from -40°C to +85°C and is housed in a TO-92-3 package.

Feature Summary

• Provides a stable bandgap reference for precision applications
• Functions as an open-loop error amplifier
• Offers adjustable output voltage capability

Applications

• Precision power supplies
• Battery chargers
• Voltage monitoring circuits

Procurement Notes

Verify the specific suffix 'LN' against the manufacturer's official documentation to confirm pinout compatibility and electrical specifications, as variations exist within the SPX431 family. Confirm availability status directly with authorized distributors, as lead times and stock levels fluctuate. Ensure the TO-92-3 package form factor matches the target PCB design requirements before finalizing procurement decisions.

Selection Notes

Select this component when a low-cost, adjustable shunt regulator with 1% initial accuracy is required. It is suitable for applications needing a reliable reference voltage or error amplifier function in compact through-hole designs. Consider the 50ppm/°C temperature coefficient for thermal stability requirements. Compare against fixed-reference alternatives if adjustable output is not strictly necessary.

Part Context

The SPX431 series belongs to MaxLinear's portfolio of power management integrated circuits, specifically under voltage references. This family includes various packages such as SOT-23 and TO-92. The SPX431LN-L/TR represents the through-hole variant, distinct from surface-mount options like the SPX431AM1-L/TR. It shares core functional characteristics with other SPX431 models but differs in physical packaging and specific manufacturing lot qualifications.

Replacement Considerations

Public documents indicate qualification of alternate qualified parts for related models like SPX431LN-L. Verify cross-references with standard TL431 equivalents only if electrical parameters match exactly. Check for any Product Change Notifications regarding wire bonding or material changes that might affect long-term reliability.