TLVH431BCPK

Overview

The TLVH431BCPK is an automotive-grade, low-voltage adjustable precision shunt voltage reference manufactured by Texas Instruments. It operates within a supply voltage range of 2.5 V to 18 V and provides an adjustable output voltage from 1.24 V to 18 V. The device features a typical initial accuracy of ±0.5% and a maximum temperature coefficient of 161 ppm/°C. It supports a cathode current range from 100 µA to 70 mA and functions reliably across an operating temperature range of -40°C to +125°C. Packaged in a surface-mount SOT-89-3 (TO-243AA) housing, it is designed for high-reliability applications requiring stable voltage regulation.

Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for enhanced reliability
• Adjustable output voltage capability spanning from 1.24 V up to the maximum supply limit
• High precision performance with tight initial accuracy tolerance specifications
• Wide thermal operating range suitable for demanding environmental conditions

Applications

• Automotive power supply monitoring circuits
• Battery management system voltage references
• Precision shunt regulator implementations in control modules
• Industrial sensor signal conditioning interfaces

Procurement Notes

Verify the specific suffix 'B' indicates the required accuracy grade during procurement. Confirm the package designation matches the SOT-89-3 footprint requirements for your PCB layout. Ensure the component meets the necessary automotive quality standards if deployed in safety-critical systems. Cross-reference the datasheet revision to confirm pinout compatibility with existing designs.

Selection Notes

Select this component when automotive reliability and wide temperature operation are mandatory. The SOT-89-3 package offers a compact solution for space-constrained designs. Consider the ±0.5% accuracy requirement against application tolerances. Evaluate the 70 mA sink current capability against load demands. Verify input voltage constraints do not exceed the 18 V maximum rating.

Part Context

This part belongs to the TLVH431 family of low-voltage adjustable shunt regulators. The 'Q1' or 'Q' suffix typically denotes automotive qualification, while 'B' specifies the accuracy grade. It serves as a robust alternative to standard industrial references in harsh environments. The family shares core architectural similarities but varies in packaging and precision specifications.

Replacement Considerations

Compatible substitutes include other AEC-Q100 qualified shunt references in SOT-89-3 packages. Verify that replacement parts maintain the same 1.24 V minimum reference voltage and 70 mA current limits. Check for identical pin configurations to ensure direct board compatibility without schematic modifications.