TLV431ACDBVTE4

Overview

The TLV431ACDBVTE4 is a low-voltage, adjustable precision shunt regulator manufactured by Texas Instruments. It operates within an input voltage range of 2.5 V to 36 V and provides an adjustable output voltage from 1.24 V to 36 V. The device features an initial accuracy of ±1% and a maximum temperature coefficient of 92 ppm/°C. It supports a cathode current range from 1 mA to 100 mA and functions reliably across an operating temperature range of -40°C to +125°C. Packaged in a compact SOT-23-3 surface-mount format, it serves as a high-performance reference for power management applications.

Feature Summary

• Provides precise voltage regulation with ±1% initial accuracy for stable reference performance
• Operates at low voltages starting from 2.5 V, suitable for battery-powered systems
• Features a wide operating temperature range from -40°C to +125°C for industrial reliability
• Delivers high cathode current capability up to 100 mA for robust load driving

Applications

• Adjustable voltage and current references in power supply circuits
• Secondary side regulation in flyback switch-mode power supplies (SMPS)
• Replacement for Zener diodes in board-level voltage clamping applications
• Voltage monitoring circuits requiring precise threshold detection
• Comparators with integrated reference voltage sources

Procurement Notes

Verify the specific suffix 'E4' indicates lead-free packaging compliant with RoHS standards. Confirm the package type matches the required PCB footprint, typically SOT-23-3 for this variant. Ensure the operating environment stays within the specified -40°C to +125°C range. Check for any specific automotive or industrial qualification requirements if applicable to the end product design.

Selection Notes

Select this component when a low-voltage adjustable reference is needed with high accuracy and wide temperature stability. It is ideal for designs requiring better performance than standard Zener diodes but lower cost than dedicated IC regulators. Consider the 100 mA current drive capability for direct load interfacing without additional buffering stages.

Part Context

This part belongs to the TLV431 family of adjustable shunt regulators, designed as low-voltage alternatives to the traditional TL431. While the standard TL431 requires higher start-up voltages, the TLV431 series enables operation in systems powered by single-cell lithium batteries or 3.3 V logic rails. The 'A' grade denotes tighter initial accuracy specifications compared to baseline variants.

Replacement Considerations

• TLV431ACDBZR
• TLV431ACDBZRG4

FAQ

What is the minimum operating voltage for the TLV431ACDBVTE4?

The device begins regulating at a minimum input voltage of 2.5 V.

Does this component support automotive applications?

Yes, the specified operating temperature range of -40°C to +125°C aligns with automotive environmental requirements.

How does the accuracy compare to standard TL431 devices?

The 'A' grade offers ±1% initial accuracy, which is generally tighter than the standard ±2% or ±5% found in basic TL431 variants.