TLVH431AQDBZT

Overview

The TLVH431AQDBZT is a low-voltage adjustable precision shunt regulator from Texas Instruments, housed in an SOT-23-3 surface-mount package. It provides an adjustable output voltage range from 1.24 V to 18 V. The device features an initial accuracy of 1% and a maximum temperature coefficient of 138 PPM/°C. It operates with a maximum input voltage of 20 V and supports a cathode current range from 80 µA to 80 mA. The component functions within an ambient temperature range of -40°C to +125°C.

Feature Summary

• Adjustable output voltage capability spanning from the internal reference level up to 18 V via external resistors
• High precision performance characterized by 1% initial accuracy and low temperature drift
• Wide operating current range enabling stable regulation from microampere to milliampere levels
• Automotive-grade qualification ensuring reliability across extended industrial temperature ranges

Applications

• Precision voltage references for analog-to-digital converter circuits
• Programmable power supply output regulation
• Battery-operated equipment requiring accurate voltage monitoring
• Industrial control systems needing robust shunt regulation

Procurement Notes

Verify the specific suffix 'Q' indicates automotive grade qualification when sourcing. Confirm the 'DBZ' package designation corresponds to the SOT-23-3 form factor required for your PCB layout. Ensure the ordering part number matches the exact temperature range and accuracy specifications defined in the official datasheet to avoid functional mismatches in critical applications.

Selection Notes

Select this component when a low-voltage, high-precision shunt regulator is required for space-constrained designs. The SOT-23-3 package offers a compact footprint suitable for portable electronics. Consider the 1% accuracy and wide current range if your application demands tight voltage tolerance over varying load conditions and temperatures compared to standard Zener diodes.

Part Context

This device belongs to the TLVH431 family of low-voltage adjustable precision shunt regulators. It serves as a modern alternative to traditional TL431 devices, offering improved performance at lower voltages. The family includes variants with different accuracy grades and temperature ranges, all sharing the same fundamental three-terminal shunt regulator topology designed for efficient power management.

Replacement Considerations

The TLVH431AQDBZTG4 is a verified equivalent part number representing the same component with RoHS compliance markings. Other members of the TLVH431 family may serve as substitutes if their specific accuracy or temperature ratings align with the design requirements.