TL431IDBZR

Overview

The TL431IDBZR is a precision adjustable shunt regulator from Texas Instruments, part of the TL431 series. It operates within a reference voltage range of 2.495V to 36V and features an initial accuracy of ±1%. Packaged in a compact SOT-23-3 surface-mount format, it supports a maximum cathode current of 100mA and a maximum input voltage of 37V. The device functions over an extended temperature range from -40°C to +85°C with a temperature coefficient of 92 ppm/°C.

Feature Summary

• Provides precise programmable reference voltage functionality for power management circuits
• Utilizes a three-terminal shunt topology for efficient voltage regulation
• Designed for surface-mount installation in space-constrained applications

Applications

• Precision voltage references in switching power supplies
• Output voltage regulation in DC-DC converters
• Comparator circuits requiring stable threshold levels

Procurement Notes

Verify the specific suffix 'IDBZR' against the manufacturer's latest datasheet to confirm pinout compatibility and tolerance grades. Ensure the ordering configuration matches the required package type and accuracy specifications for the target design.

Selection Notes

Select this component when a low-cost, high-accuracy adjustable reference is needed in a small footprint. Consider the ±1% initial accuracy and thermal stability for applications demanding tight voltage control without external trimming components.

Part Context

This device belongs to the widely adopted TL431 family of programmable shunt regulators. It serves as a standard solution for feedback loop stabilization and voltage referencing in industrial and consumer electronics, offering a reliable alternative to fixed voltage references.

Replacement Considerations

The TL431AIDBZR is listed as a manufacturer-recommended substitute. Verify electrical parameters and package dimensions before implementation.