TL431QDBVRE4

Overview

The TL431QDBVRE4 is an automotive-grade adjustable precision shunt regulator manufactured by Texas Instruments. It operates within a reference voltage range of 2.495 V to 36 V and supports a maximum cathode current of 100 mA. The device features a temperature coefficient of 92 ppm/°C and maintains operation across an extended industrial temperature range from -40°C to +125°C. Packaged in a compact SOT-23-5 surface-mount format, it ensures stable performance for power management applications requiring high accuracy and reliability under varying thermal conditions.

Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for enhanced reliability
• Adjustable output voltage capability spanning 2.495 V to 36 V
• Precision shunt regulation topology with low temperature drift
• Compact five-pin SOT-23 surface-mount package design

Applications

• Automotive power supply regulation circuits
• Battery management system voltage monitoring
• Industrial control system reference voltage generation
• High-reliability DC-DC converter feedback loops

Procurement Notes

Verify the complete part number including the E4 suffix to confirm lead-free composition and specific manufacturing lot details. Confirm automotive grade status through official Texas Instruments documentation prior to integration. Ensure compatibility with RoHS directives and check for any recent product change notices affecting pinout or electrical specifications. Validate supplier authorization to guarantee component authenticity and traceability.

Selection Notes

Select this component when automotive reliability and wide operating temperature ranges are required. The SOT-23-5 package suits space-constrained designs needing precise shunt regulation. Consider the 100 mA current limit for load requirements. Verify that the 92 ppm/°C temperature coefficient meets circuit stability needs. Compare against standard commercial grades if automotive certification is not mandatory for the application.

Part Context

This device belongs to the TL431 family of programmable shunt regulators, widely used for voltage referencing and control. The Q prefix denotes automotive qualification, while DBVR indicates the SOT-23-5 tape-and-reel packaging. The E4 suffix specifies lead-free construction. This variant integrates the core TL431 functionality with enhanced durability specifications suitable for harsh automotive environments.

Replacement Considerations

TL431QDBVR is the non-lead-free equivalent with identical electrical characteristics and pinout. TL431AQDBVRQ1G4 offers similar automotive qualification with potentially different initial accuracy grades. Verify pin compatibility and thermal performance before substitution.