TLV431AQPKG3

Overview

The TLV431AQPKG3 is an automotive-grade, low-voltage, three-terminal adjustable shunt voltage reference manufactured by Texas Instruments. It operates within a supply voltage range of 2.5 V to 36 V and provides an adjustable output voltage from 1.24 V to the cathode voltage. The device features a typical initial accuracy of ±1% and maintains stability across an operating temperature range of -40°C to +125°C. Packaged in a surface-mount SOT-89-3 (TO-243AA) housing, it supports a maximum cathode current of 100 mA and requires a minimum cathode current of 100 µA for regulation.

Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for enhanced reliability in vehicle electronics.
• Low-voltage operation capability enabling use in systems with supply voltages as low as 2.5 V.
• High precision adjustable reference with tight initial accuracy tolerance for stable feedback control.
• Integrated active output stage providing fast transient response and low dynamic output impedance.

Applications

• Isolated feedback circuits in secondary-side regulated flyback switch-mode power supplies.
• Precision voltage monitoring and supervision in automotive electronic control units.
• Replacement for Zener diodes in board-level voltage regulation applications.
• Reference inputs for comparators requiring high stability and low drift.

Procurement Notes

Verify component authenticity through authorized distribution channels due to the prevalence of counterfeits in the market. Confirm that the specific suffix matches the required automotive grade specifications. Check for RoHS compliance status relevant to your manufacturing region. Ensure storage conditions adhere to moisture sensitivity level requirements prior to reflow soldering processes.

Selection Notes

Select this component when designing for automotive environments requiring AEC-Q100 certification. Choose this part over standard industrial grades if long-term reliability under thermal cycling and vibration is critical. Consider the SOT-89-3 package size constraints against available PCB real estate. Evaluate the 100 mA cathode current limit against peak load requirements in the target application circuit.

Part Context

This device belongs to the TLV431 family of adjustable shunt regulators, specifically tailored for automotive applications. It shares functional similarities with the TL431 but offers improved performance at lower supply voltages. The 'Q' designation indicates automotive qualification, distinguishing it from commercial variants like the TLV431PKG3. It serves as a core reference element in isolated power conversion topologies.

Replacement Considerations

TLV431AQDRQ1

FAQ

What is the minimum operating voltage for the TLV431AQPKG3?

The device requires a minimum supply voltage of 2.5 V to function correctly.

Does the TLV431AQPKG3 meet automotive reliability standards?

Yes, it is qualified according to the AEC-Q100 standard for integrated circuits.

What is the typical initial accuracy of this voltage reference?

The typical initial accuracy is ±1% over the specified temperature range.