TL431AQPK

$0.16

Description：IC VREF SHUNT ADJ 1% SOT89-3
Series：-
Mfr：Texas Instruments
Package：Tape & Reel (TR),Cut Tape (CT)

SKU:f967cb53c734 Category: Voltage Reference Brand: Texas Instruments

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Product introduction

Product Detailed Parameters

Description：IC VREF SHUNT ADJ 1% SOT89-3
Series：-
Mfr：Texas Instruments
Package：Tape & Reel (TR),Cut Tape (CT)
Output Type：Adjustable
Voltage - Output (Min/Fixed)：2.495V
Voltage - Output (Max)：36 V
Current - Output：100 mA
Operating Temperature：-40°C ~ 125°C (TA)
Mounting Type：Surface Mount
Package / Case：TO-243AA
Supplier Device Package：SOT-89-3
Grade：-
Qualification：-

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TL431AQPK

Overview

The TL431AQPK is a three-terminal adjustable precision shunt regulator manufactured by Texas Instruments. It operates within an automotive temperature range of -40°C to 125°C and utilizes a SOT-89-3 surface-mount package. The device provides an adjustable output voltage ranging from 2.495V to 36V, referenced against an internal 2.495V threshold. It features a typical output impedance of 0.2Ω and supports cathode currents between 1mA and 100mA with a minimum reference current of 700µA. The component meets RoHS3 standards and carries an MSL rating of 2.

Feature Summary

Automotive-grade thermal stability specified for operation across wide temperature extremes
Adjustable output voltage capability utilizing external resistor networks
Low output noise characteristics suitable for sensitive analog circuits

Applications

Board-level voltage regulation systems
Switching power supply feedback loops
Portable equipment power management

Procurement Notes

Verify the specific suffix 'QPK' indicates the required automotive qualification and SOT-89-3 packaging configuration. Confirm that the sourcing channel provides documentation supporting the extended temperature range requirements. Ensure compatibility with lead-free assembly processes as indicated by RoHS3 compliance status.

Selection Notes

Select this component when automotive reliability and precise voltage referencing are required in compact surface-mount designs. The SOT-89-3 package offers a balance between thermal dissipation and board space efficiency compared to smaller alternatives. Consider the 1% initial accuracy tolerance for applications demanding tight voltage regulation without complex calibration.

Part Context

This part belongs to the TL431 family of programmable shunt regulators. It serves as a direct replacement for standard Zener diodes in many linear regulation contexts. The 'A' grade denotes 1% initial accuracy, while the 'Q' prefix signifies automotive qualification. It shares functional similarities with the TL432 but differs in pinout and package options.