ATL431LIAQDBZR

Overview

The ATL431LIAQDBZR is an automotive-grade, high-bandwidth, low-quiescent current programmable shunt regulator manufactured by Texas Instruments. It operates within a supply voltage range of 2.5 V to 36 V and provides an adjustable output voltage across the same span. The device features an initial accuracy of 1% and a temperature coefficient of 66 ppm/°C. It supports a maximum cathode current of 15 mA with a minimum operating current of 80 µA. Designed for robust performance, it functions reliably across an extended temperature range from -40°C to +125°C. The component is housed in a compact SOT-23-3 surface-mount package.

Feature Summary

• Automotive-grade reliability certified for harsh operational environments
• High bandwidth capability supporting fast transient response requirements
• Low quiescent current design optimizing power efficiency in standby modes
• Wide input voltage range accommodating diverse system architectures

Applications

• Automotive sensor signal conditioning circuits
• Battery management system reference voltages
• Industrial control loop feedback networks
• Precision analog-to-digital converter references

Procurement Notes

Verify the complete part number including all suffixes to ensure correct automotive qualification and package variant. Confirm that the specific revision level matches your design requirements. Check for any recent product change notifications regarding material composition or assembly site changes. Ensure compatibility with your automated assembly processes regarding the SOT-23-3 footprint. Validate that the sourcing channel provides genuine components with full traceability.

Selection Notes

Select this component when automotive certification is mandatory for the application. Choose this model over standard industrial variants if extended temperature operation up to 125°C is required. Consider this part for designs needing precise voltage referencing with minimal static power consumption. Evaluate the 1% initial accuracy against your circuit tolerance requirements. Compare the 15 mA drive capability with your load demands before finalizing the selection.

Part Context

This device belongs to the ATL431LI family of programmable shunt regulators designed specifically for automotive electronics. It shares functional similarities with the TL431 series but offers enhanced bandwidth and lower current consumption. The 'Q' suffix indicates AEC-Q100 qualification, distinguishing it from non-automotive counterparts. It serves as a critical reference element in precision power management and sensing applications within vehicles.

Replacement Considerations

Direct substitutes include other AEC-Q100 qualified shunt regulators from Texas Instruments such as the TLVH431AQDBZR for low-voltage applications. Cross-brand replacements require careful verification of pinout compatibility and electrical parameter margins. Ensure any alternative meets the same -40°C to +125°C operating temperature range and automotive reliability standards.