TL431AIDRG4

Overview

The TL431AIDRG4 is an adjustable precision shunt regulator manufactured by Texas Instruments. It operates within a cathode voltage range of 2.5 V to 36 V and provides an initial accuracy of ±1%. The device supports a maximum cathode current of 100 mA and maintains operation across a temperature range of -40°C to +85°C. Packaged in an 8-SOIC surface-mount format, it functions as a low-cost alternative to zener diodes with superior performance characteristics.

Feature Summary

• Provides precise programmable reference voltage via external resistor divider
• Offers high thermal stability with low temperature coefficient
• Features fast transient response for dynamic load conditions

Applications

• Precision voltage regulation in power supply circuits
• On-board voltage monitoring systems
• Voltage references for analog-to-digital converters

Procurement Notes

Verify the specific suffix 'G4' indicates RoHS compliance and lead-free construction per manufacturer specifications. Confirm the SOIC-8 package dimensions match the target PCB footprint. Ensure the operating temperature range aligns with the system environment requirements before finalizing procurement.

Selection Notes

Select this component when a stable, adjustable reference voltage is required in space-constrained designs. The SOIC-8 package facilitates automated surface-mount assembly. Consider the 100 mA current capability for driving moderate loads directly without additional buffering stages.

Part Context

This part belongs to the TL431 family of adjustable shunt regulators, widely used in industrial and consumer electronics. The 'A' designation specifies the ±1% initial accuracy grade, while 'IDR' denotes the 8-SOIC package with tape-and-reel packaging for high-volume manufacturing efficiency.

Replacement Considerations

Compatible substitutes include the TL431AIDR and TL431AIDBZR. Verify pinout compatibility and electrical parameters such as maximum cathode current and operating voltage range before substitution.