The LM317AEMP/NOPB is a high-performance adjustable linear voltage regulator from Texas Instruments, designed to deliver stable output voltages across a wide range of applications. This SOT-223-4 package device operates with an input voltage range of 3V to 40V and provides an adjustable output voltage from 1.25V to 37V, supporting up to 1.5A of continuous output current. It combines robust protection features with precise voltage regulation, making it suitable for industrial, automotive, and consumer electronics requiring reliable power management.

Key Features

This regulator features an ultra-wide output voltage range (1.25V–37V) and low dropout voltage, enabling efficient operation even under varying input conditions. It integrates thermal shutdown, short-circuit protection, and safe-operating-area (SOA) compensation to ensure reliability under fault conditions. With a typical quiescent current of 10mA and a PSRR of up to 80dB (at 120Hz), it minimizes noise and ensures stable output under load variations. The device operates across an extended temperature range (-40°C to +125°C) and supports surface-mount assembly (SOT-223-4 package), enabling compact and rugged designs.

Applications

The LM317AEMP/NOPB is widely used in adjustable power supplies, battery charging systems, and LED driver circuits requiring precise current regulation. Its high current capability and wide voltage range make it ideal for industrial equipment, medical devices, and automotive systems. It is also employed in laboratory bench power supplies, portable electronics, and embedded systems where programmable voltage output and fault protection are critical. The device’s compatibility with external components (e.g., resistors, capacitors) allows customization for specific applications like EV/HEV charging or sensor power rails.

Summary

The LM317AEMP/NOPB stands out as a versatile, high-reliability solution for adjustable voltage regulation in demanding environments. Its combination of wide voltage range, robust protection, and compact SOT-223-4 package makes it a go-to choice for applications requiring precise power management without compromising on performance or durability. Whether in industrial control systems or portable devices, this regulator delivers consistent performance under harsh conditions.