TL431BQDBVTE4

Overview

The TL431BQDBVTE4 is an adjustable precision shunt regulator manufactured by Texas Instruments. It operates within a cathode voltage range of 2.50 V to 36.0 V and provides an adjustable output voltage from 2.495 V to 36 V. The device supports a maximum cathode current of 100 mA with a minimum operating current of 600 µA. It features a typical accuracy of ±0.5% and a temperature coefficient of ±92 ppm/°C. The component functions across an extended industrial temperature range of -40 °C to +125 °C and utilizes a surface-mount SOT-23-5 package.

Feature Summary

• Provides high-precision adjustable voltage regulation suitable for demanding applications
• Capable of handling significant load currents up to 100 mA
• Designed for reliable operation in extreme environmental conditions

Applications

• Portable equipment power supplies
• DC-to-DC converters
• Internal reference voltage sources

Procurement Notes

Verify the specific suffix 'E4' against official manufacturer documentation to confirm compliance with RoHS directives and lead-free status. Confirm that the component remains available, as lifecycle notices indicate potential obsolescence for certain variants within this family. Ensure the ordering quantity aligns with standard packaging configurations provided by authorized distributors.

Selection Notes

Select this component when precise voltage referencing is required in space-constrained designs utilizing the SOT-23-5 footprint. Consider the wide operating temperature range for automotive or industrial environments. Evaluate the 100 mA current capability against circuit load requirements to ensure adequate headroom for stable regulation under varying load conditions.

Part Context

This part belongs to the TL431 family of programmable shunt regulators, widely utilized for feedback control in switching power supplies. The 'BQ' designation typically indicates automotive-grade qualification standards, while 'E4' denotes environmental compliance. It serves as a cost-effective alternative to Zener diodes where higher accuracy and lower temperature drift are necessary.

Replacement Considerations

Direct substitutes include the TL431BQDBVR and TL431BQDBZTG4. Verify pinout compatibility and electrical specifications before substitution.