The TMI3255T is a high efficiency 600kHz, Constant-on-Time (COT) control mode synchronous step-down DC-DC converter capable of delivering up to 5A current. TMI3255T integrates main switch and synchronous switch with very low RDS(ON) to minimize the conduction loss. Low output voltage ripple and small external inductor and capacitor size are achieved with 600kHz switching frequency. It adopts the COT architecture to achieve fast transient responses for high voltage step down applications. The TMI3255T requires a minimum number of readily available standard external components and is available in a 6-pin SOT23-6 RoHS compliant package.