OptiMOS™ Integrated POL 40 A - Single Output High Efficiency Buck Regulator IR3846A OptiMOS™ IPOL is an easy-to-use, fully integrated DC-DC buck regulator with patented fast Constant-On-Time (COT) control scheme. It simplifies design effort with a small footprint, which fulfill customer needs for high power density. Meanwhile, IR3846A enables an enhanced transient response and improved Vout regulation with single switching frequency, thus it’s ideal for various applications looking for high efficiency, low EMI and compact solution.