ATL431LIAQDBZRQ1

Overview

The ATL431LIAQDBZRQ1 is an automotive-grade, high-bandwidth, low-quiescent current programmable shunt regulator manufactured by Texas Instruments. It operates within a voltage range of 2.5 V to 36 V and features an initial accuracy of 1% with a temperature coefficient of 66 PPM/C. The device supports a maximum cathode current of 15 mA and a minimum operating current of 80 µA. It functions reliably across an extended temperature range from -40°C to +125°C. Packaged in a compact SOT-23-3 surface-mount format, it serves as a precision reference for power management applications.

Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for reliability
• High bandwidth capability supporting fast transient response requirements
• Low quiescent current design optimizing efficiency in battery-powered systems
• Adjustable output voltage ranging from 2.5 V to 36 V via external resistors

Applications

• Battery monitoring circuits in automotive infotainment systems
• Precision voltage references for analog-to-digital converters
• Current sensing amplifier references in power distribution units
• Feedback loop compensation in DC-DC converter topologies

Procurement Notes

Verify the complete part number including suffixes to ensure correct automotive grade and package configuration. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Check for recent Product Change Notifications regarding assembly sites or marking updates. Ensure ESD handling procedures are followed during storage and installation to maintain component integrity.

Selection Notes

Select this component when automotive reliability and wide operating voltage ranges are required. Compare against TLV431BQDBZRQ1 if lower input voltage operation below 6 V is sufficient. Consider ATL431LIBQDBZRQ1 for tighter initial accuracy specifications. Evaluate thermal performance within the SOT-23-3 package constraints under maximum load conditions.

Part Context

This device belongs to the ATL431LI family of programmable shunt regulators designed specifically for automotive environments. It shares functional similarities with the industry-standard TL431 but offers enhanced bandwidth and optimized quiescent current characteristics. The Q1 suffix indicates automotive qualification, distinguishing it from commercial variants while maintaining pin compatibility for many legacy designs.

Replacement Considerations

ATL431LIBQDBZRQ1 offers improved initial accuracy. TLV431BQDBZRQ1 provides low-voltage operation suitable for inputs below 6 V. PATL432LIAQDBZRQ1 serves as a dual-channel alternative for space-constrained designs requiring multiple references.