TLV431QPK

Overview

The TLV431QPK is a low-voltage adjustable precision shunt regulator manufactured by Texas Instruments. It operates within an input voltage range of 1.24 V to 18 V and provides an adjustable output voltage referenced to the internal 1.24 V reference. The device features an initial accuracy tolerance of ±1.5% at 25°C. It supports a cathode current up to 70 mA and functions reliably across a temperature range of -40°C to +125°C. Packaged in a SOT-89-3 surface-mount case, it serves as a high-performance voltage reference for power management applications.

Feature Summary

• Adjustable output voltage capability ranging from the internal reference level up to the maximum input voltage limit
• High initial accuracy with specified tolerance ensuring precise voltage regulation under varying conditions
• Extended thermal stability designed for reliable operation across wide industrial and commercial temperature ranges

Applications

• Precision voltage references in battery-powered equipment
• Programmable output regulators in DC-DC converters
• Feedback control loops in isolated power supplies

Procurement Notes

Verify that the component suffix QPK corresponds to the specific automotive or qualified grade requirements for your design. Confirm the package type matches the PCB footprint and soldering profile. Ensure the operating voltage and current limits align with the system specifications before finalizing procurement orders.

Selection Notes

Select this component when a low-voltage adjustable reference is required with high accuracy. Compare against standard TL431 variants if higher voltage ratings are needed. Consider the SOT-89-3 package constraints regarding thermal dissipation and board space. Verify compatibility with the target application's temperature range and regulatory compliance standards.

Part Context

This part belongs to the TLV431 family of low-voltage adjustable precision shunt regulators. It shares functional similarities with other shunt regulators but is optimized for lower voltage operations starting at 1.24 V. The QPK suffix indicates a specific packaging and qualification variant within the broader Texas Instruments voltage reference portfolio.

FAQ

What is the minimum operating voltage for the TLV431QPK?

The minimum operating voltage is determined by the internal reference voltage of 1.24 V.

Does the TLV431QPK support negative temperature coefficients?

The datasheet specifies thermal stability over the applicable industrial and commercial temperature ranges without explicitly detailing negative coefficient options.