TL431ACPW

Overview

The TL431ACPWR is a three-terminal adjustable shunt regulator manufactured by Texas Instruments. It operates within an input voltage range of 2.5 V to 36 V and provides an initial accuracy of ±1.0%. The device supports a maximum output current of 100 mA and features a temperature coefficient of 92 ppm/°C. Designed for through-hole installation, it utilizes a TO-92 package with three pins. The operational temperature range spans from 0°C to +70°C, ensuring stability in commercial environments.

Feature Summary

• Provides precise voltage regulation via external resistor setting between the reference voltage and maximum limit
• Features active output circuitry for sharp turn-on characteristics suitable as Zener diode replacement
• Maintains specified thermal stability across applicable automotive and commercial temperature ranges

Applications

• On-board regulation circuits
• Adjustable power supplies
• Switching power supplies

Procurement Notes

Verify the specific suffix against official documentation to confirm package type and availability status. Confirm RoHS compliance requirements match project specifications. Ensure the selected variant meets the required operating temperature range for the intended application environment before finalizing procurement decisions.

Selection Notes

Select this component when a low-cost, high-accuracy adjustable reference is required for through-hole designs. Consider the 100 mA current capability and TO-92 form factor for board space constraints. Verify that the ±1.0% initial accuracy and 92 ppm/°C temperature coefficient meet the system's precision requirements.

Part Context

This part belongs to the TL431 family of programmable shunt regulators widely used in power management. It serves as a versatile alternative to fixed voltage references and Zener diodes. The device integrates a bandgap reference and error amplifier to maintain stable output voltages under varying load conditions.

Replacement Considerations

Direct substitutes include LM431 variants or equivalent parts from other manufacturers such as STMicroelectronics. Verify pinout compatibility and electrical parameter alignment before substitution.