TLVH431AQLPR

Overview

The TLVH431AQLPR is a low-voltage adjustable precision shunt regulator manufactured by Texas Instruments. It operates within a supply voltage range of up to 20 V, with an adjustable output voltage spanning from 1.24 V to 18 V. The device features an initial accuracy of 1% and a temperature coefficient of 138 PPM/C. It supports a maximum cathode current of 80 mA and a minimum operating current of 80 µA. The component is housed in a TO-92-3 through-hole package and functions reliably across an extended temperature range from -40°C to +125°C.

Feature Summary

• Adjustable output voltage capability ranging from 1.24 V to 18 V via external resistor divider
• High precision performance with 1% initial accuracy and stable temperature characteristics
• Wide operating current range supporting low-power standby and high-current sink applications

Applications

• Precision voltage reference circuits requiring low voltage operation
• Battery-operated equipment where power efficiency is critical
• Switch-mode power supplies utilizing shunt regulation for feedback control

Procurement Notes

Verify the specific suffix 'QLPR' against the manufacturer's latest documentation to confirm package type and quality level. Ensure compatibility with existing PCB footprints for the TO-92-3 through-hole configuration. Cross-reference the part number with official Texas Instruments databases to validate current production status and availability constraints before finalizing procurement plans.

Selection Notes

Select this component when a through-hole adjustable shunt regulator is required for low-voltage applications. The 1% accuracy suits general precision tasks, while the 80 mA sink current handles moderate load variations. Consider the TO-92-3 package for manual assembly or legacy board designs. Evaluate thermal management requirements given the wide operating temperature range and power dissipation limits inherent to shunt regulators.

Part Context

This part belongs to the TLVH431 family of low-voltage adjustable shunt regulators from Texas Instruments. It serves as a drop-in replacement for standard TL431 devices in low-voltage systems, offering improved performance at lower supply voltages. The family includes various accuracy grades and packages, with the 'A' grade indicating 1% initial accuracy and 'Q' denoting automotive-grade qualification standards.

Replacement Considerations

Direct substitutes include other TLVH431 variants with matching accuracy and package, such as TLVH431ALPR. Verify pinout compatibility and electrical specifications against the original design requirements before substitution.