TL431BVD

Overview

The TL431BVD is a three-terminal programmable shunt regulator diode from onsemi. 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 cathode current range of 1.0 mA to 100 mA and exhibits a typical dynamic impedance of 0.22 Ω. It features a voltage reference tolerance of ±0.4% at 25°C and an equivalent full-range temperature coefficient of 50 ppm/°C. Designed for industrial applications, it functions within an operating ambient temperature range of -40°C to +125°C.

Feature Summary

• Programmable output voltage adjustable up to 36 V via external resistors
• Temperature compensated operation across the full rated operating temperature range
• Low dynamic output impedance ensuring stable regulation performance
• High precision voltage reference with ±0.4% tolerance at 25°C

Applications

• Single-supply comparators with temperature-compensated thresholds
• Digital voltmeters requiring stable reference voltages
• Power supplies utilizing feedback control or shunt regulation
• Op amp circuitry serving as precision voltage references

Procurement Notes

Verify the specific suffix 'D' corresponds to the SOIC-8 package and confirm the extended temperature rating (-40°C to +125°C) matches system requirements. Ensure compatibility with lead-free manufacturing processes if required by design specifications. Cross-reference ordering information to validate shipping formats such as rail or tape and reel availability for production integration.

Selection Notes

Select this component when high precision and wide temperature stability are critical. The ±0.4% tolerance suits applications demanding tight voltage accuracy. Verify that the SOIC-8 package fits the PCB layout constraints. Consider the 1.0 mA minimum cathode current requirement to ensure proper regulation during operation. Evaluate thermal dissipation capabilities relative to the expected load conditions.

Part Context

This device belongs to the TL431, A, B series of programmable precision references manufactured by onsemi. It serves as a monolithic IC voltage reference designed to replace traditional Zener diodes in various electronic circuits. The family includes variants with different tolerances and temperature ranges, with the TL431BVD specifically offering high precision and extended industrial temperature coverage.

Replacement Considerations

TL431BVDR2G (Tape & Reel version)

FAQ

What is the maximum programmable output voltage?

The output voltage can be programmed up to 36 V using two external resistors.

Does the TL431BVD support automotive applications?

Yes, the TL431BVD operates over an extended temperature range of -40°C to +125°C, suitable for demanding environments.