TL432LIBEDBZRQ1

Overview

The TL432LIBEDBZRQ1 is an automotive-grade adjustable precision shunt regulator manufactured by Texas Instruments. It operates within a supply voltage range of up to 36 V and provides an initial accuracy of 0.5%. The device features a low temperature coefficient of 63 PPM/C, ensuring stable reference performance across varying thermal conditions. It supports a maximum cathode current of 15 mA with a minimum operating current of 600 uA. The component is designed for robust operation in extreme environments, functioning reliably between -40°C and +150°C. It is housed in a compact SOT-23-3 surface-mount package suitable for space-constrained automotive electronics.

Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for long-term reliability
• High thermal stability maintained through a low temperature coefficient of 63 PPM/C
• Precision regulation capability with 0.5% initial accuracy at 25°C
• Extended high-temperature operational range supporting harsh automotive environments

Applications

• Automotive power supply feedback loops requiring precise voltage referencing
• Battery management systems needing stable threshold detection
• Engine control units utilizing programmable shunt regulation
• Safety-critical automotive electronics demanding functional safety compliance

Procurement Notes

Verify the complete part number including suffixes to ensure correct temperature grade and packaging configuration. Confirm AEC-Q100 qualification status is required for your specific automotive application tier. Check for functional safety documentation availability if ISO 26262 compliance is necessary. Ensure the SOT-23-3 footprint matches your PCB design constraints. Validate that the 15 mA cathode current limit meets your circuit's sink requirements.

Selection Notes

Select this component when automotive reliability and extended temperature range are critical priorities. The 63 PPM/C temperature coefficient offers superior thermal stability compared to standard industrial grades. The 0.5% initial accuracy ensures tighter tolerance bands for precision applications. Consider the 15 mA current limit against load requirements; higher current needs may require alternative devices. The SOT-23-3 package provides a compact solution for dense automotive PCB layouts.

Part Context

This device belongs to the TL432LI-Q1 family of programmable shunt regulators designed specifically for automotive markets. It shares functional similarities with the TL431 series but utilizes a different pinout arrangement optimized for specific mounting styles. The LI suffix indicates enhanced low-drift characteristics suitable for precision applications. Integration into automotive systems requires adherence to strict quality and reliability standards defined by major OEMs.

Replacement Considerations

Direct substitutes include other TL432LI-Q1 variants with differing accuracy or temperature grades. Verify pin compatibility as the TL432 pinout differs from the TL431. Ensure replacement parts maintain the same AEC-Q100 qualification level. Check that the replacement device supports the required 15 mA cathode current and 36 V maximum voltage.