TL431BIDCKT

Overview

The TL431BIDCKT is an adjustable precision shunt regulator manufactured by Texas Instruments. It operates within a voltage range of 2.5 V to 36 V and provides an initial accuracy of ±0.5%. The device supports a maximum output current of 100 mA and features a temperature coefficient of 92 ppm/°C. It is housed in a 6-pin SC-70 surface-mount package with dimensions of 2 x 1.25 x 0.9 mm. The component functions effectively across a temperature range from -40 °C to +85 °C, with a maximum input voltage rating of 37 V.

Feature Summary

• Provides adjustable reference voltage functionality with high initial accuracy
• Utilizes a compact surface-mount SC-70 package for space-constrained designs
• Operates as a shunt regulator topology suitable for parallel circuit configurations

Applications

• Portable equipment power supplies
• DC-to-DC converters
• Internal reference voltage sources

Procurement Notes

Verify the specific suffix 'CKT' corresponds to the tape and reel packaging configuration when sourcing. Confirm that the automotive qualification status aligns with project requirements, as variants may differ. Ensure the SC-70 footprint matches the PCB layout specifications. Cross-reference the manufacturer part number against official distributor catalogs to confirm active production status and availability.

Selection Notes

Select this component when a precise, low-cost adjustable reference is required in a small form factor. The ±0.5% accuracy suits applications demanding tighter tolerance than standard references. Consider the 100 mA cathode current capability for load regulation needs. Evaluate the thermal performance within the specified operating temperature range for the intended environment.

Part Context

This device belongs to the TL431 family of programmable shunt regulators. These components are widely used as voltage references and error amplifiers in switching power supplies. The TL431 series offers a cost-effective alternative to Zener diodes with superior temperature stability and adjustability. The SC-70 variant specifically targets modern surface-mount assembly processes.

Replacement Considerations

Direct substitutes include other TL431 variants with compatible pinouts and electrical characteristics. Verify package compatibility when considering alternatives from different manufacturers. Ensure replacement parts meet the same accuracy and temperature coefficient specifications.