TL431SDT,215

Overview

The TL431SDT,215 is a programmable shunt voltage reference manufactured by NXP Semiconductors. It operates within an input voltage range of up to 37 V and provides an adjustable output voltage from 2.4 V to 36 V. The device features an initial accuracy and tolerance of 0.5%, with a maximum operating temperature of +125 °C and a minimum of -40 °C. It supports a cathode current of 100 mA and requires a supply current of 10 mA. Packaged in a TO-236-3 (SOT-23-3) surface-mount case, it is supplied in tape and reel format.

Feature Summary

• Provides precise programmable shunt regulation for stable voltage references
• Ensures high accuracy with 0.5% initial tolerance across the operating range
• Supports wide thermal operation suitable for demanding industrial environments

Applications

• Programmable power supplies requiring stable reference voltages
• Battery-operated equipment needing accurate voltage monitoring
• DC-to-DC converters utilizing internal feedback loops

Procurement Notes

Verify the specific suffix '215' confirms the tape and reel packaging configuration. Ensure the TO-236-3 package variant matches the target PCB footprint requirements. Confirm that the 0.5% accuracy grade meets the system's precision specifications before finalizing procurement orders.

Selection Notes

Select this component when a low-cost, high-accuracy shunt reference is required in a compact SOT-23 form factor. It is suitable for designs needing adjustable output voltages up to 36 V with tight tolerance constraints. Consider its 100 mA current capability for driving feedback networks in switching regulators.

Part Context

This part belongs to the widely used TL431 family of programmable shunt voltage references. It serves as a standard solution for replacing Zener diodes in linear regulator circuits and feedback paths. The device offers superior temperature stability and dynamic impedance compared to traditional fixed references.

Replacement Considerations

Compatible substitutes include the TL431AIDBZR and TL431AIDBVT, which offer similar electrical characteristics and pinouts. Verify that alternative packages maintain the same thermal performance and mechanical dimensions for direct board replacement.