ATL432LI

The ATL432LI is a precision adjustable shunt regulator manufactured by Texas Instruments, designed for stable voltage reference applications in power supply and signal conditioning circuits. It features a low quiescent current of typically 1.5 mA, making it ideal for battery-powered or energy-efficient systems. The device offers a wide operating voltage range from 2.5 V to 36 V, allowing flexibility across various industrial and consumer electronics platforms. This integrated circuit provides an accurate reference voltage with a typical initial accuracy of ±0.5% over temperature, ensuring reliable performance under varying environmental conditions. Its internal bandgap reference and high gain amplifier enable tight regulation, with a maximum output voltage tolerance of ±1% across temperature and load variations. The ATL432LI also includes built-in thermal shutdown protection, enhancing system reliability during overcurrent or overheating scenarios. The device operates with a very low dynamic impedance, contributing to excellent line and load regulation. It supports external resistor programming of the output voltage between 2.5 V and 36 V using two resistors connected to the reference and cathode pins, simplifying design integration without requiring complex calibration. This programmable feature makes it suitable for use as a precision voltage reference, a comparator, or a simple power supply regulator in isolated or non-isolated DC-DC converter designs. Common applications include power supply regulation in portable devices, industrial control systems, microcontroller reset circuits, and analog-to-digital conversion reference buffering. It is widely used in automotive electronics, telecom equipment, and consumer appliances where compact size, low power consumption, and high stability are critical. The ATL432LI is available in a TO-92 package, offering easy surface-mount or through-hole mounting options for flexible PCB layout. Its robust design and consistent performance make it a preferred choice for engineers seeking a cost-effective, space-saving solution for voltage regulation and reference generation in both high-volume production and prototype development environments.