TL431IPG

Overview

The TL431IPG is a three-terminal programmable shunt regulator diode from onsemi, housed in a PDIP-8 package. It operates as a low temperature coefficient Zener reference, programmable from Vref to 36 V using two external resistors. The device supports a cathode current range of 1.0 mA to 100 mA with a typical dynamic impedance of 0.22 Ω. It features a reference input voltage tolerance of ±2.2% and an equivalent full-range temperature coefficient of 50 ppm/°C. Operating within an ambient temperature range of -40 °C to +85 °C, it serves as a precision voltage reference.

Feature Summary

• Programmable output voltage capability up to 36 V
• Temperature compensated for operation over the 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
• Voltage monitors

Procurement Notes

Verify the specific suffix 'IPG' corresponds to the PDIP-8 package and the -40 °C to +85 °C industrial temperature grade. Confirm that the ±2.2% tolerance aligns with design requirements, as other variants offer tighter tolerances. Ensure the ordering code matches the required shipping configuration, such as rail quantities for this package type.

Selection Notes

Select the TL431IPG when a through-hole PDIP-8 package is required for industrial temperature applications. Consider alternative packages like SOIC-8 or TO-92 if board space constraints differ. Verify that the ±2.2% reference voltage tolerance meets the system's accuracy needs compared to higher precision A or B series options.

Part Context

This component belongs to the TL431A, B series of programmable precision references manufactured by onsemi. These monolithic ICs function as adjustable shunt regulators, replacing traditional Zener diodes in various analog and digital circuits. The family includes automotive qualified variants with prefixes like NCV and SCV for enhanced reliability and traceability.

Replacement Considerations

Direct replacements include other TL431 variants with different packages or tolerances, such as TL431IDG (SOIC-8) or TL431AILP (TO-92). Cross-manufacturer equivalents like the LM431 or KA431 may be compatible but require verification of pinout and electrical characteristics against the official datasheet.