TL431BQLPE3

Overview

The TL431BQLPE3 is an adjustable precision shunt regulator from Texas Instruments, designed for high-accuracy voltage reference applications. It operates within a cathode voltage range of 2.5V to 36V and supports a maximum cathode current of 100mA with a minimum operating current of 600µA. The device features an initial accuracy of 0.5% and a temperature coefficient of 92ppm/°C. It is housed in a TO-92-3 through-hole package and is qualified for automotive applications, ensuring reliability across the specified operating temperature range.

Feature Summary

• Provides adjustable precision voltage reference functionality with 0.5% initial accuracy
• Qualified for automotive applications to meet rigorous reliability standards
• Operates as a shunt regulator with low minimum cathode current requirements

Applications

• Automotive power supply regulation circuits
• Precision voltage references in industrial control systems
• Battery management system monitoring
• Linear regulator feedback loops requiring high stability

Procurement Notes

Verify that the specific suffix 'QL' confirms automotive qualification and extended temperature range capabilities as defined by Texas Instruments. Ensure the ordering part number matches the required package variant and compliance status. Cross-reference the manufacturer's latest datasheet to confirm active production status and any potential lifecycle changes before finalizing procurement decisions.

Selection Notes

Select this component when automotive-grade reliability and tight initial accuracy are required. The TO-92 package suits through-hole designs where space constraints allow. Compare against standard commercial variants if automotive certification is unnecessary, noting that the QL suffix denotes specific qualification criteria distinct from general-purpose models.

Part Context

This device belongs to the TL431 family of programmable shunt regulators. The TL431 series is widely used for replacing zener diodes in applications requiring better performance and adjustability. The TL431BQLPE3 specifically targets the automotive segment, offering enhanced robustness compared to standard commercial versions while maintaining the core adjustable reference functionality.

Replacement Considerations

Direct replacements include other automotive-qualified TL431 variants such as TL431BQDR or TL431BQDBZRG4, provided the package type (SOIC-8 or SOT-23-3) is compatible with the design. Verify pinout compatibility and thermal characteristics when substituting surface-mount packages for through-hole designs.