TLV431AIDR

Overview

The TLV431AIDR is a low-voltage adjustable precision shunt regulator manufactured by Texas Instruments. It operates within an input voltage range of up to 7 V and provides an adjustable output voltage from 1.24 V to 6 V. The device features an initial accuracy of 1% and a temperature coefficient of 138 PPM/C. It supports a maximum cathode current of 15 mA with a minimum operating current of 80 µA. The component is housed in an 8-SOIC package and functions across a temperature range of -40°C to +85°C.

Feature Summary

• Provides high-precision voltage regulation with 1% initial accuracy for stable reference applications.
• Operates at low voltages, supporting input supplies up to 7 V for energy-efficient designs.
• Features low minimum operating current of 80 µA to minimize power consumption in standby modes.

Applications

• Precision voltage references in battery-powered portable devices
• Feedback control loops in switching power supplies
• Voltage monitoring circuits requiring accurate threshold detection

Procurement Notes

Verify the specific suffix (DR) indicates tape-and-reel packaging when ordering. Confirm the 'A' grade designation ensures the specified 1% accuracy and 138 PPM/C temperature coefficient. Check for RoHS compliance status as indicated in official documentation. Ensure the 8-SOIC footprint matches the target PCB layout constraints before finalizing procurement.

Selection Notes

Select this component when low-voltage operation is required, as it supports inputs up to 7 V unlike standard 36 V regulators. Choose the 'A' grade variant if strict 1% accuracy and specific thermal stability are necessary. The 8-SOIC package offers a balance between pin count and board space. Consider the 15 mA current limit for load requirements.

Part Context

This part belongs to the TLV431 family of low-voltage adjustable shunt regulators. It serves as a modern alternative to traditional TL431 devices, offering improved performance at lower supply voltages. The device integrates a bandgap reference and error amplifier to maintain precise output regulation under varying load conditions.

Replacement Considerations

Direct substitutes include TLV431AIDRG4 and TLV431AIDRE4, which share identical electrical characteristics and pinouts. Verify that replacement parts maintain the same 'A' grade accuracy and SOIC-8 packaging configuration.