International Rectifier IR3823 SupIRBuck is a 3A easy-to-use, fully integrated and highly efficient synchronous Buck regulator intended for Point-Of-Load (POL). The IR3823 features programmable switching frequency from 300kHz to 1.5MHz, three selectable soft-start time options, and smooth synchronization to an external clock. The IR3823 uses voltage mode control employing a proprietary PWM modulator, allowing high control bandwidth and fast loop response with less output capacitors. The other important functions include thermally compensated over current protection, output over voltage protection and thermal shut-down, etc. International Rectifier IR3823 is offered in a small 3.5mm x 3.5mm PQFN package with excellent thermal performance.