TL431BQDE4

Overview

The TL431BQDE4 is an adjustable precision shunt regulator manufactured by Texas Instruments, housed in an SOIC-8 package. It provides a reference voltage range from 2.495 V to 36 V with an initial accuracy of 0.5%. The device operates within a temperature range of -40°C to +125°C and features a maximum input voltage of 36 V. It supports a maximum shunt current of 100 mA and has a minimum operating current of 600 µA. The typical temperature coefficient is 92 ppm/°C.

Feature Summary

• Provides adjustable output voltage between 2.495 V and 36 V using two external resistors
• Offers high thermal stability across automotive, commercial, and military temperature ranges
• Features low output impedance for stable regulation performance

Applications

• Board-level voltage regulation
• Adjustable power supplies
• Switching power supply feedback loops

Procurement Notes

Verify the specific suffix 'E4' indicates lead-free compliance and RoHS status as per official documentation. Confirm the SOIC-8 package dimensions match design constraints. Ensure the B-grade accuracy specification meets circuit requirements before finalizing procurement orders.

Selection Notes

Select this component when precise voltage referencing is required in space-constrained surface-mount designs. The SOIC-8 package offers a balance between pin count and board area. Consider the 0.5% initial accuracy and wide operating temperature range for robust performance in demanding environments compared to standard Zener diodes.

Part Context

This part belongs to the TL431 family of three-terminal adjustable shunt regulators. It serves as a direct replacement for traditional Zener diodes in many applications, offering superior accuracy and temperature stability. The device is widely used in power management circuits where reliable voltage reference is critical.

Replacement Considerations

Direct substitutes include TL431BQDR and TL431BQDRE4. Verify pinout compatibility and electrical specifications before substitution.