TLV431BQDBVRE4

Overview

The TLV431BQDBVRE4 is an adjustable precision shunt regulator manufactured by Texas Instruments, belonging to the TLV431B series. It features a reference voltage of 1.24 V and supports an adjustable output range from 1.24 V to 6 V. The device offers an initial accuracy of ±0.5% and operates with a maximum cathode current of 15 mA. It functions within a supply voltage range up to 7 V and maintains performance across a temperature range of -40°C to +125°C. Packaged in a SOT-23-5 surface-mount case, it serves as a low-voltage alternative to standard Zener diodes.

Feature Summary

• Provides precise adjustable voltage referencing via external resistors
• Ensures high thermal stability across industrial temperature ranges
• Delivers sharp turn-on characteristics for effective regulation

Applications

• Isolated feedback circuits in switch-mode power supplies
• Secondary side voltage regulation in flyback converters
• Replacement for low-voltage Zener diodes in board-level稳压

Procurement Notes

Verify the 'E4' suffix indicates lead-free compliance per manufacturer standards. Confirm the package type matches the required PCB footprint. Ensure the operating voltage requirements align with the 7 V maximum limit. Check for automotive qualification if the application demands AEC-Q100 standards, noting that specific variants may carry distinct reliability ratings.

Selection Notes

Select this component when a low-voltage, high-precision reference is required in compact designs. The SOT-23-5 package suits space-constrained applications. Consider the ±0.5% accuracy for tight tolerance loops. Evaluate the 15 mA current capability against load requirements. Verify compatibility with the target switching frequency in feedback networks.

Part Context

This part belongs to the TLV431 family of low-voltage adjustable shunt regulators. It replaces traditional TL431 devices in modern low-voltage systems. The Q designation typically implies automotive-grade reliability, while the E4 suffix denotes environmental compliance. It integrates a bandgap reference and error amplifier in a small form factor.

Replacement Considerations

TLV431BQDBVR is a direct functional equivalent without the E4 suffix. TLV431AIDBZR offers similar functionality with different accuracy grades. Verify pinout compatibility before substitution. Ensure thermal and electrical ratings meet or exceed original design specifications.