TL431IDG

Overview

The TL431IDG is a three-terminal programmable shunt regulator diode from onsemi, housed in an SOIC-8 package. It operates as a low temperature coefficient zener reference, with output voltage programmable from Vref to 36 V using two external resistors. The device supports a wide operating current range of 1.0 mA to 100 mA and features a typical dynamic impedance of 0.22 Ω. It includes temperature compensation for operation over the full rated ambient temperature range of -40 °C to +85 °C.

Feature Summary

• Programmable output voltage capability up to 36 V
• Temperature compensated for full rated operating temperature range
• Low dynamic output impedance for stable regulation
• Wide sink current capability ranging from 1.0 mA to 100 mA

Applications

• Digital voltmeters
• Power supplies
• Op amp circuitry
• Shunt regulators
• Series regulators

Procurement Notes

Verify component authenticity through authorized onsemi channels or certified distributors. Confirm RoHS compliance and Pb-Free status prior to integration. Check for specific automotive prefixes (NCV/SCV) if AEC-Q100 qualification is required. Ensure ordering suffix matches the desired shipping format and tolerance grade.

Selection Notes

Select the TL431IDG when a precision adjustable reference is needed within the industrial temperature range. Consider the ±1.0% tolerance variant for standard applications. Evaluate stability boundary conditions regarding load capacitance and cathode current to ensure loop stability in feedback configurations.

Part Context

This component belongs to the TL431A, B series of programmable precision references manufactured by onsemi. It serves as a versatile replacement for traditional Zener diodes in various analog and power management circuits. The device integrates internal bandgap-like reference structures to maintain accuracy across varying thermal conditions.

Replacement Considerations

TL431AIDG