The LM3485MMX/NOPB with Switching Controllers Hysteretic PFET Buck Cntlr is an integrated, high performance, step-down switching regulator controller manufactured by Texas Instruments. It is designed to drive an external PFET and a low-cost inductor to regulate the output voltage to a programmable value. The LM3485 comes with integrated high current hysteretic regulator, which allows for higher conversions of step-down switching regulators. Its wide range of features, including programmable output voltage, programmable feedback, variable frequency operation, over-temperature protection, and programmable current limit, make it suitable for a wide variety of applications. It is mainly used for DC/DC applications such as portable computing, automotive, and consumer products.