The LM317AEMPX/NOPB is a high-precision, adjustable positive-voltage linear regulator from Texas Instruments, designed for versatile power management in industrial and consumer applications. This TO-252-3 (DPAK) packaged device delivers up to 1.5A output current with a programmable voltage range of 1.25V to 37V. It operates with an input voltage from 4.2V to 40V and features ±1% output voltage accuracy over its full range. The regulator includes built-in protection circuits, such as short-circuit, overcurrent, and thermal shutdown, ensuring robust operation under harsh conditions.

Key Features

This regulator offers a wide input/output voltage range with ultra-low dropout voltage (2.25V typical), enabling efficient operation in high-variability power systems. Its 0.005%/V line regulation and 0.1% load regulation ensure stable output under varying loads and input conditions. With 80dB ripple rejection and minimal output noise (0.003%VOUT over 10Hz–10kHz), it provides clean power for sensitive circuits. The device supports operation from -40°C to 125°C, making it suitable for automotive and industrial environments. Its compact DPAK package and minimal external components simplify PCB design while maintaining high performance.

Applications

Primarily used in industrial power supplies, battery chargers, and adjustable power modules, the LM317AEMPX/NOPB is ideal for applications requiring precise voltage regulation, such as lab equipment, LED drivers, and microprocessor core power rails. It is also employed in automotive systems for DC-DC conversion and in portable devices needing compact, high-current voltage regulation. Its robust protection features make it suitable for fault-prone environments like industrial automation and battery management systems.

Summary

The LM317AEMPX/NOPB combines high precision, wide voltage flexibility, and rugged reliability, making it a cornerstone for linear regulation in demanding applications. Its integration of protection circuits, minimal component count, and extended temperature range ensure seamless operation in diverse systems, from consumer electronics to industrial and automotive markets. This device remains a trusted solution for achieving stable, adjustable power delivery with minimal design complexity.