The TMI3255SF is a high efficiency, Constant onTime (COT) control mode synchronous step-down  DC-DC converter capable of delivering up to 5A  current. TMI3255SF 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 typical 600kHz switching  frequency. It adopts the COT architecture and force  PWM operation in steady state to achieve fast  transient responses for high voltage step down  applications. The TMI3255SF requires a minimum number of  readily available standard external components  and is available in a 6-pin SOT23-6 RoHS  compliant package.