TL431ACDG4

Overview

The TL431ACDG4 is an adjustable precision shunt regulator manufactured by Texas Instruments. It operates within a supply voltage range of 2.5V to 36V and provides an adjustable output voltage from 2.495V to 36V. The device features an initial accuracy of ±1% and a temperature coefficient of 92 ppm/°C. It supports a maximum cathode current of 100 mA with a minimum operating current of 600 µA. The component is housed in an SOIC-8 surface-mount package, measuring 4.9 mm in length, 3.91 mm in width, and 1.58 mm in height. It functions reliably across a temperature range of -40°C to +125°C.

Feature Summary

• Provides precise adjustable voltage reference functionality via external resistor divider
• Ensures stable regulation performance across extended industrial temperature ranges
• Delivers high accuracy for demanding power management applications

Applications

• Precision voltage references in power supply circuits
• Programmable output control in switching regulators
• Voltage monitoring and threshold detection systems

Procurement Notes

Verify the specific suffix DG4 indicates RoHS compliance and lead-free construction as per Texas Instruments standards. Confirm the SOIC-8 package dimensions match design constraints. Ensure the ±1% accuracy grade meets circuit requirements. Check for any recent Product Change Notifications regarding assembly sites or material updates before finalizing procurement.

Selection Notes

Select this component when a high-accuracy adjustable shunt regulator is required in a surface-mount format. The wide operating voltage range allows flexibility in various power architectures. Consider the thermal performance and package size relative to available board space. Verify that the 100 mA current capability aligns with the load requirements of the specific application design.

Part Context

This part belongs to the TL431 family of programmable shunt regulators, widely used as voltage references and error amplifiers. The TL431 series serves as a versatile alternative to Zener diodes, offering superior stability and adjustability. It is a standard component in Texas Instruments' power management portfolio for linear and switching power supplies.

Replacement Considerations

Direct replacements include the TL431ACDR and LM431ACM/NOPB. Verify pinout compatibility and electrical specifications such as accuracy and temperature range before substitution.