TL431BQDR

Overview

The TL431BQDR is an adjustable precision shunt regulator manufactured by Texas Instruments, housed in an SOIC-8 surface-mount package. It provides a reference voltage range from 2.495 V to 36 V with an initial accuracy of 0.5%. The device supports a maximum cathode current of 100 mA and operates within a temperature range of -40°C to +125°C. Key electrical parameters include a series input voltage maximum of 36 V and a temperature coefficient of 92 PPM/°C.

Feature Summary

• Provides precise adjustable voltage regulation via a single external resistor divider network
• Ensures stable performance across wide industrial temperature ranges
• Offers high accuracy for demanding reference applications

Applications

• Precision power supply feedback loops
• Portable equipment voltage references
• DC-to-DC converter control circuits

Procurement Notes

Verify the specific suffix 'BQ' against the official Texas Instruments datasheet to confirm the exact tolerance grade and operating temperature range specifications. Ensure the SOIC-8 package dimensions match the target PCB footprint requirements before finalizing procurement decisions.

Selection Notes

Select this component when a 0.5% initial accuracy is required for shunt regulation. Consider the 100 mA cathode current limit for load handling capabilities. Verify that the 36 V maximum input voltage aligns with the system's operational limits.

Part Context

This part belongs to the TL431 family of programmable shunt regulators. It serves as a versatile voltage reference solution for various power management applications, offering a cost-effective alternative to Zener diodes with superior stability and adjustability features.

Replacement Considerations

TL431BCDR is a confirmed substitute with identical SOIC-8 packaging and similar electrical characteristics.