TL431BIPG

Overview

The onsemi TL431BIPG is a three-terminal programmable shunt regulator diode in an 8-pin PDIP package. It operates as a low temperature coefficient zener, providing a reference voltage of 2.495 V at 25 °C with a tolerance of ±0.4 %. The device supports a cathode current range of 1.0 mA to 100 mA and a maximum cathode-to-anode voltage of 37 V. It features a typical dynamic impedance of 0.22 Ω and a full-range temperature coefficient of 50 ppm/°C. Operating temperatures range from -40 °C to +85 °C.

Feature Summary

• Programmable output voltage capability up to 36 V using two external resistors
• High precision voltage reference with ±0.4% initial tolerance at 25 °C
• Low dynamic output impedance for stable regulation across the operating current range
• Temperature compensated operation over the full rated industrial temperature range

Applications

• Digital voltmeters
• Power supplies
• Op amp circuitry

Procurement Notes

Verify the specific suffix 'P' indicates the PDIP-8 package configuration before ordering. Confirm that the 'B' designation aligns with the required ±0.4% voltage reference tolerance for your application. Ensure the operating environment stays within the specified -40 °C to +85 °C range. Check for any automotive-specific prefix requirements if the application demands AEC-Q100 qualification. Always consult the latest datasheet revision for updated mechanical dimensions and marking codes.

Selection Notes

Select the TL431BIPG when a precise, adjustable shunt reference is needed in through-hole designs. The B series offers tighter initial accuracy than standard variants, making it suitable for applications requiring strict voltage limits. Consider the PDIP-8 package for prototyping or environments where surface-mount technology is not feasible. Evaluate the thermal resistance characteristics if high power dissipation is expected in the design.

Part Context

This component belongs to the TL431A, B series of programmable precision references manufactured by onsemi. These devices are widely used as replacements for traditional Zener diodes due to their superior stability and adjustability. The family includes various packages and temperature grades, with the TL431BIPG specifically representing the industrial grade version in a plastic dual in-line package.

Replacement Considerations

Direct substitutes include other TL431B variants in different packages such as TL431BCDG (SOIC-8) or TL431BILPG (TO-92). Cross-brand equivalents like LM431 or KA431 may offer pin-compatible solutions but require verification of electrical parameters.