TLVH431QLPE3

Overview

The TLVH431QLPE3 is a low-voltage adjustable precision shunt regulator manufactured by Texas Instruments. It operates within an input voltage range up to 20 V and provides an adjustable output voltage from 1.24 V to 18 V. The device features an initial accuracy of 1.5% and a maximum temperature coefficient of 161 PPM/°C. It supports a maximum cathode current of 70 mA with a minimum operating current of 100 µA. The component is designed for through-hole mounting in a TO-92-3 package, ensuring reliable performance across an extended temperature range of -40°C to +125°C.

Feature Summary

• Adjustable output voltage capability via external resistor divider
• Low operating current suitable for power-constrained designs
• Extended temperature stability over the full industrial range

Applications

• Battery-operated equipment
• Switch-mode power supplies
• Data acquisition systems

Procurement Notes

Verify the specific suffix 'QLPE3' against the official Texas Instruments datasheet to confirm the exact accuracy grade and qualification status. Ensure the TO-92-3 through-hole package matches the target PCB footprint. Confirm RoHS compliance and check for any recent Product Change Notifications or End-of-Life notices associated with this specific ordering variant before finalizing procurement.

Selection Notes

Select this component when a through-hole adjustable reference is required for low-voltage applications. The 1.5% accuracy and 161 PPM/°C temperature coefficient define its precision class. Compare the 70 mA sink current limit against load requirements. Consider the TO-92-3 package size constraints relative to available board space and thermal dissipation needs in the final assembly.

Part Context

This part belongs to the TLVH431 family of low-voltage adjustable precision shunt regulators. It serves as a cost-effective alternative to higher-voltage references like the TL431, specifically optimized for operation below 20 V. The family offers various accuracy grades and packages, with the QLPE3 variant providing a specific combination of tolerance and automotive-grade qualification in a standard through-hole form factor.

Replacement Considerations

Check for direct pin-compatible substitutes such as other TLVH431 variants with different suffixes for accuracy or package changes. Verify if the legacy TL431 series can be used if input voltage exceeds 20 V. Consult the manufacturer's replacement guide for qualified alternatives.