TL431BCLPE3

Overview

The TL431BCLPE3 is an adjustable precision shunt regulator manufactured by Texas Instruments, housed in a TO-92-3 through-hole package. It features an initial accuracy of 0.5% and operates within a temperature range of -40°C to +125°C. The device supports an input voltage up to 36 V with a maximum shunt current of 100 mA and a minimum cathode current of 600 µA. Its temperature coefficient is 92 PPM/°C, ensuring stable reference performance across industrial conditions.

Feature Summary

• Provides adjustable output voltage ranging from 2.495 V to 36 V via external resistor divider
• Delivers high precision with 0.5% initial accuracy for critical reference applications
• Operates reliably across extended industrial temperature ranges from -40°C to +125°C

Applications

• Precision voltage references in power supply circuits
• On-line isolation amplifiers requiring stable reference voltages
• Programmable output controllers for switching regulators

Procurement Notes

Verify the specific suffix 'E3' confirms lead-free and RoHS compliance status as per the latest manufacturer documentation. Confirm the TO-92-3 bulk packaging details match project requirements. Ensure the component is sourced from authorized distributors to guarantee authenticity and traceability. Check for any recent product discontinuance notifications or lifecycle changes directly from Texas Instruments before finalizing procurement plans.

Selection Notes

Select this component when high accuracy (0.5%) and wide operating temperature (-40°C to +125°C) are required in a through-hole package. Compare against TL431CLPE3 if lower accuracy (2%) is acceptable for cost reduction. Consider surface-mount alternatives like TL431BCPWR if PCB space constraints necessitate SMD packages. Verify that the 100 mA max shunt current meets the load requirements of the specific circuit design.

Part Context

This part belongs to the TL431 family of programmable shunt regulators, widely used as voltage references and error amplifiers. The 'B' designation indicates 0.5% accuracy, while 'CL' specifies the commercial/industrial temperature grade and package type. The 'E3' suffix denotes environmental compliance including lead-free construction. It serves as a standard solution for precise voltage regulation in analog and mixed-signal circuits.

Replacement Considerations

Direct pin-compatible substitutes include TL431ACPE3 and TL431BCPE3. For identical accuracy and temperature range, consider TL431BQLPRE3. Surface-mount equivalents such as TL431BCPWR offer functional parity in different packages. Verify electrical specifications match exactly before substitution.