TL431BQLPR

Overview

The TL431BQLPR is a three-terminal adjustable precision shunt regulator manufactured by Texas Instruments. It operates within a voltage range of 2.495 V to 36 V and features an initial accuracy of ±0.5%. The device supports a maximum cathode current of 100 mA with a minimum operating current of 600 µA. It utilizes a TO-92-3 through-hole package and functions across a temperature range from -40°C to +125°C, exhibiting a temperature coefficient of 92 ppm/°C.

Feature Summary

• Provides precise adjustable voltage regulation via external resistors
• Delivers high thermal stability across extended industrial temperature ranges
• Offers low output impedance for stable performance in switching applications

Applications

• Board-level voltage regulation
• Adjustable power supply circuits
• Switching mode power supplies (SMPS)
• Replacement for Zener diodes in reference applications

Procurement Notes

Verify the specific suffix 'Q' indicates automotive qualification requirements if applicable to your design environment. Confirm that the TO-92-3 through-hole package aligns with your PCB footprint constraints. Ensure the 100 mA cathode current capability meets the load requirements of your shunt regulator circuit design.

Selection Notes

Select this component when high precision (±0.5%) is required over a wide temperature range. It is suitable for designs needing robust thermal stability up to 125°C. Consider the through-hole package if surface-mount options are not feasible or if mechanical durability is prioritized.

Part Context

This part belongs to the TL431 family of adjustable shunt regulators. It serves as a versatile reference element in power management systems. The device replaces discrete Zener diodes to provide superior accuracy and temperature stability in linear and switching regulator topologies.

Replacement Considerations

TL431BILPR is a documented substitute offering identical electrical specifications and pinout compatibility within the same package type.