ATL431LIBIDBZR

Overview

The ATL431LIBIDBZR is an automotive-grade, adjustable precision shunt voltage reference manufactured by Texas Instruments. It operates within a cathode-to-reference voltage range of 2.5 V to 36 V and delivers an initial accuracy of ±0.5%. The device features a temperature coefficient of 66 ppm/°C and supports a maximum shunt current of 15 mA with a minimum operating current of 100 µA. Designed for surface-mount installation in SOT-23-3 packages, it functions reliably across an extended temperature range from -40°C to +85°C.

Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for high reliability
• High precision performance with ±0.5% initial accuracy and low temperature drift
• Capable of handling up to 15 mA shunt current for robust regulation

Applications

• Automotive power supply monitoring circuits
• Precision voltage references in automotive infotainment systems
• Battery management system feedback loops

Procurement Notes

Verify the specific suffix IDBZR confirms the SOT-23-3 package and tape-and-reel delivery format. Confirm the LIB designation indicates the required ±0.5% accuracy grade and automotive qualification status. Ensure the component meets RoHS3 compliance requirements for your manufacturing process. Cross-check the datasheet revision against your design specifications to ensure parameter consistency.

Selection Notes

Select this component when automotive reliability and tight tolerance are critical. The ±0.5% accuracy suits applications requiring precise voltage thresholds without external trimming. The 15 mA current capability allows direct driving of low-impedance loads or comparators. Consider the SOT-23-3 footprint for space-constrained PCB layouts in automotive modules.

Part Context

This part belongs to the ATL431LI family of programmable shunt regulators designed specifically for automotive environments. It serves as a high-performance alternative to standard TL431 devices, offering improved accuracy and thermal stability. The family integrates a bandgap reference and error amplifier into a compact three-terminal package suitable for dense automotive electronics assemblies.

Replacement Considerations

ATL431LIAQDBZRQ1 offers similar functionality but with ±1% accuracy instead of ±0.5%. ATL431LIBQDBZRQ1 provides the same ±0.5% accuracy and automotive qualification. Verify that any substitute maintains the SOT-23-3 pinout and meets the specific temperature coefficient requirements of the original design.