TL431AIDG4

Overview

The TL431AIDG4 is an adjustable precision shunt regulator manufactured by Texas Instruments, housed in an SOIC-8 surface-mount package. It provides a reference voltage tolerance of 0.5% at 25°C and supports an adjustable output voltage range from the internal reference up to 36V. The device operates with a maximum cathode current of 100mA and maintains functionality across an extended temperature range of -40°C to +125°C. With a typical temperature coefficient of 92 PPM/°C, it serves as a stable voltage reference for power management circuits.

Feature Summary

• Adjustable output voltage capability spanning from the internal reference level up to 36V using external resistors
• High initial accuracy with a 0.5% reference voltage tolerance at 25°C
• Extended operational stability across industrial temperature ranges from -40°C to +125°C

Applications

• Onboard regulation in electronic systems
• Adjustable power supply designs
• Switching power supply feedback loops
• Undervoltage monitoring applications

Procurement Notes

Verify component authenticity through authorized channels due to potential counterfeits. Confirm RoHS compliance status via official documentation. Check datasheet revisions for any pinout or electrical specification updates. Ensure storage conditions meet moisture sensitivity level requirements before assembly.

Selection Notes

Select this component when precise voltage referencing is required in space-constrained designs utilizing SOIC-8 packages. Consider the 0.5% tolerance for high-accuracy applications. Evaluate thermal performance within the specified operating range. Compare against standard TL431 variants if higher accuracy or specific packaging options are needed.

Part Context

This part belongs to the TL431 family of programmable shunt regulators widely used in power electronics. It functions similarly to a Zener diode but offers adjustable voltage settings. The device integrates an internal bandgap reference and error amplifier to maintain stable output voltages under varying load conditions.

Replacement Considerations

Direct substitutes include other TL431 variants with compatible pinouts and electrical characteristics. Verify package compatibility and temperature ratings when selecting alternatives. Cross-reference specifications to ensure equivalent performance in existing circuit designs.