TL431BCDMR2G

Overview

The TL431BCDMR2G is a programmable shunt voltage reference from onsemi, part of the TL431 family. It operates within an input voltage range of 2.5V to 36V and supports output currents up to 100mA. The device features a typical initial accuracy of ±0.4% and a temperature coefficient of 50 ppm/°C. Packaged in an 8-pin SOIC surface-mount format with dimensions of 5mm x 1.5mm, it functions as a three-terminal reference. Key electrical parameters include line regulation of 53mV and load regulation of 25mV. It is designed for operation between 0°C and 70°C.

Feature Summary

• Provides a stable, adjustable reference voltage across a wide operating range
• Functions as a precision shunt regulator for circuit stabilization
• Offers high accuracy suitable for demanding analog applications

Applications

• Precision power supply regulation
• Voltage monitoring circuits
• Battery chargers

Procurement Notes

Verify the specific suffix 'MR2G' against official datasheets to confirm package type and tape-and-reel specifications. Ensure the required accuracy grade matches the B subcode. Confirm RoHS compliance status for the specific manufacturing batch. Check thermal management requirements for the SOIC-8 package under maximum load conditions. Validate that the operating temperature range meets system constraints.

Selection Notes

Select this component when a low-cost, high-accuracy programmable reference is needed. The TL431BCDMR2G is suitable for designs requiring precise voltage setting without external complex networks. Consider the 100mA current capability for driving feedback loops. Evaluate the ±0.4% tolerance against system error budgets. Compare thermal performance in the SOIC package against alternative form factors if space is limited.

Part Context

This device belongs to the widely used TL431 series of programmable shunt regulators. These components are standard industry references for linear power supplies and feedback control loops. The TL431 architecture provides a reliable alternative to Zener diodes with superior temperature stability and lower dynamic impedance. The family is known for its versatility in various industrial and consumer electronics applications.

Replacement Considerations

Compatible substitutes include the TL431ACDR2G and TL431IDR2G from onsemi, which offer different accuracy grades. Other manufacturers produce pin-compatible equivalents such as the LM431 or REF33xx series, though electrical characteristics may vary. Verify pinout compatibility and thermal resistance before substitution.