TL431BIDBVR

Overview

The TL431BIDBVR is a low-voltage adjustable precision shunt regulator manufactured by Texas Instruments. It operates within an output voltage range of 2.495 V to 36 V and provides an initial accuracy of ±0.5%. The device supports a maximum cathode current of 100 mA and withstands a maximum input voltage of 37 V. It functions reliably across a temperature range of -40 °C to +85 °C with a maximum temperature coefficient of 92 ppm/°C. Packaged in a surface-mount SOT-23-5 (SC-74A) housing, it serves as a stable reference for power management applications.

Feature Summary

• Provides high-precision voltage regulation with ±0.5% initial accuracy
• Features sharp turn-on characteristics compared to temperature-compensated Zener diodes
• Operates as a three-terminal programmable reference with adjustable output
• Designed for low-voltage applications with wide input voltage tolerance

Applications

• Precision voltage references in switching power supplies
• Voltage monitoring circuits requiring accurate threshold detection
• Linear regulators utilizing external feedback networks
• Battery-powered equipment needing stable reference voltages

Procurement Notes

Verify the specific suffix 'DBVR' confirms the SOT-23-5 package and tape-and-reel packaging format. Ensure the 'I' grade designation matches the required ±0.5% accuracy specification for your design. Confirm RoHS compliance status if restricted materials are prohibited in your assembly process. Cross-reference the manufacturer part number against official Texas Instruments documentation to avoid counterfeit components.

Selection Notes

Select this component when ±0.5% accuracy is mandatory, distinguishing it from standard TL431 variants with higher tolerances. The SOT-23-5 package offers space efficiency for compact designs. Consider the 100 mA cathode current limit for load requirements. Evaluate the -40 °C to +85 °C operating range against environmental conditions. Compare against TLV431 series if lower voltage operation or different thermal performance is needed.

Part Context

This device belongs to the widely used TL431 family of programmable shunt regulators introduced by Texas Instruments. It replaces older discrete Zener diode solutions by offering superior stability and sharper regulation characteristics. The TL431 series has become an industry standard for voltage referencing due to its reliability and cost-effectiveness in various power conversion topologies.

Replacement Considerations

Direct replacement options include TL431BIDBVRE4. Alternative sources may offer similar specifications but require verification of pinout compatibility and electrical parameter alignment.