TL1431CLPME3

Overview

The TL1431CLPME3 is a precision programmable shunt voltage reference manufactured by Texas Instruments. It operates within the commercial temperature range of 0°C to 70°C and features an initial voltage tolerance of 0.4%. The device allows output voltage adjustment from approximately 2.5V to 36V using two external resistors. It provides a sink current capability ranging from 1mA to 100mA with a typical dynamic output impedance of 0.2Ω. The component utilizes a TO-92 (TO-226AA) three-pin through-hole package.

Feature Summary

• Adjustable output voltage settable between 2.5V and 36V via external resistive divider
• High precision with 0.4% initial voltage tolerance at 25°C
• Fast turn-on characteristic suitable for clamp applications
• Internally compensated for stability without requiring output capacitors

Applications

• Secondary side regulation in flyback switching power supplies
• Adjustable voltage and current referencing circuits
• Voltage monitoring systems
• Comparator applications with integrated reference
• Replacement for Zener diodes in onboard regulation

Procurement Notes

Verify the specific suffix 'E3' indicates lead-free and RoHS compliance status as per manufacturer documentation. Confirm the 'C' designation aligns with the required commercial operating temperature range of 0°C to 70°C for your application environment. Ensure the TO-92 package form factor matches your PCB footprint requirements before finalizing procurement.

Selection Notes

Select this component when a high-precision, adjustable shunt regulator is required for commercial temperature environments. The 0.4% tolerance makes it suitable for applications demanding tight voltage accuracy. Consider the 1mA to 100mA cathode current range to ensure proper biasing for linear operation. Verify that the TO-92 package is compatible with your assembly process and thermal management strategy.

Part Context

The TL1431 series serves as a versatile analog building block combining an accurate voltage reference with an operational amplifier. It functions as a single voltage reference, error amplifier, or comparator. The TL1431C variant specifically targets commercial applications, offering specified thermal stability over the 0°C to 70°C range, distinguishing it from automotive (TL1431Q) and military (TL1431M) grades.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material.