The LM2576SX-ADJ/NOPB is a Buck Switching Regulator IC with a positive adjustable 1.23V 1 output of 3A, manufactured by Texas Instruments. This IC is designed for off-line and DC-to-DC converter applications, and can be used to produce a single output voltage from either an AC or DC input. The IC includes internal frequency compensation, current limit, error amplifier, and a thermal shut down circuit. The IC utilizes minimum parts, operates over an input voltage range from 2V to 40V, and can be used for pre-regulated low voltage outputs. This device is offered in a TO-263-6, D²Pak (5 Leads + Tab), TO-263BA package.