TL431CLPREG

Overview

The onsemi TL431CLPREG is a three-terminal programmable shunt regulator diode in a TO-92 package. It operates as a low temperature coefficient Zener, programmable from Vref to 36 V using two external resistors. The device features a reference voltage tolerance of ±2.2% at 25°C and supports a cathode current range of 1.0 mA to 100 mA. It exhibits a typical dynamic impedance of 0.22 Ω and an equivalent full-range temperature coefficient of 50 ppm/°C. The component functions effectively as a replacement for Zener diodes in precision applications.

Feature Summary

• Programmable output voltage capability up to 36 V via external resistor divider
• Temperature compensated operation across the rated ambient temperature range
• Low dynamic output impedance for stable regulation performance
• RoHS compliant construction with lead-free and halogen-free materials

Applications

• Digital voltmeters requiring precise reference standards
• Power supply feedback control loops
• Op amp circuitry utilizing stable voltage references
• Constant current source implementations

Procurement Notes

Verify the specific suffix CLPREG against the official ordering table to confirm shipping format and tolerance grade. Ensure the procurement channel sources directly from authorized distributors or onsemi to guarantee authenticity. Check for any recent Product Change Notices (PCN) regarding manufacturing site updates or material composition changes that may affect compliance documentation.

Selection Notes

Select this variant when a through-hole TO-92 package is required for manual assembly or specific mechanical constraints. The CLP suffix indicates a 2.2% initial accuracy tolerance suitable for general-purpose regulation. Consider thermal derating requirements if operating near maximum power dissipation limits within the plastic package structure.

Part Context

This component belongs to the TL431A, B series family of programmable precision references manufactured by onsemi. The TL431 architecture provides a versatile alternative to traditional Zener diodes, offering superior stability and adjustability. The CLPREG designation specifically identifies the TO-92 package style with tape and reel shipping configuration.

Replacement Considerations

Compatible substitutes include TL431CDR2G and TL431BCDR2G for surface mount SOIC-8 applications. For direct pin-compatible replacements in TO-92 packages, consider TL431BCLPRMG or TL431ACLPRAG depending on required accuracy specifications.