The TL431AQDBZT is a precision programmable voltage reference from Texas Instruments, designed to provide highly stable and adjustable voltage outputs for power supply and control applications. Encased in a compact TO-92-3 package, this device operates as a shunt regulator with a reference voltage range of 2.45V to 36V, adjustable via external resistors. It is qualified for automotive and industrial environments, supporting a broad operating temperature range of -55°C to +150°C, ensuring reliability in harsh conditions.

Key Features

This component features a tight voltage accuracy of ±1% at 25°C and maintains stable output under varying load and line conditions. It supports cathode currents from 1mA to 100mA, enabling flexibility in power management designs. The TL431AQDBZT includes thermal shutdown protection and robust ESD tolerance, ensuring safe operation under transient stress. Its wide operating voltage range (2.45V to 36V) and bidirectional control capability make it suitable for both voltage regulation and comparator applications.

Applications

Primarily used in automotive power supplies, battery chargers, and industrial power converters, the TL431AQDBZT is ideal for adjustable voltage references in linear regulators, switching regulators, and overvoltage protection circuits. It is also employed in sensor biasing, LED driver control, and reference circuits in telecommunications equipment. Its compact size and high-temperature tolerance make it suitable for space-constrained and high-thermal environments, such as engine control units (ECUs) and industrial control systems.

Summary

The TL431AQDBZT combines exceptional voltage precision, wide operating range, and rugged reliability, making it a critical component for precision power regulation in automotive, industrial, and high-temperature applications. Its versatility in configuring voltage outputs and robust protection features simplify design complexity while ensuring long-term performance in demanding systems. This device is indispensable for engineers requiring a dependable, adjustable voltage reference in compact and challenging environments.