FP6357

fitipower integrated technology lnc. FP6357 High Efficiency 1.5MHz/a18.25AT Synchronous Step Down Regulator Description The FP6357 is a high efficiency, high frequency synchronous DC-DC step-down converter. The 100% duty cycle feature provides low dropout operation, extending battery life in portable systems. The internal synchronous switch increases efficiency and eliminates the need for external Schottky diode. At shutdown mode, the input supply current is less than 1µA. The current limit protection and on-chip thermal shutdown features provide protection against any combination of overload or ambient temperature. Pin Assignments S5 Package (SOT-23-5) FB VIN 54 (Marking) 1 23 EN GND LX S6 Package (SOT-23-6) FB PG VIN 654 (Marking) 1 23 EN GND LX Figure 1. Pin Assignment of FP6357 Features  Low RDS(ON) for Internal Switch (Top/Bottom): 200/150mΩ  2.5V~5.5V Input Voltage Range  1.2A Output Current  High Efficiency up to 95%  1.5MHz Switching Frequency Minim...