矽力杰产品规格书SA24403.pdf

Application Note: SA24403 High Efficiency Fast Response, 3.5A, 40V Input Synchronous Step Down Regulator General Description Features The SA24403 develops a high efficiency synchronous  Low RDS(ON) for Internal Switches (Top/Bottom) : step-down DC/DC converter capable of delivering 115/80mΩ 3.5A load current. The SA24403 operates over a wide  4.2-40V Input Voltage Range input voltage range from 4.2V to 40V and integrates  Internal Compensation main switch and synchronous switch with very low  Internal 1ms Soft-start Limits the Inrush Current RDS(ON) to minimize the conduction loss.  Adjustable Switching Frequency Range: 300kHz to 2.2MHz The SA24403 adopts peak current control scheme. The  3.5A Output Current Capability switching frequency is adjustable from 300kHz to  ±2% 0.6V Reference Over -40°C~125°C 2.2MHz using an external resistor. The device also  Cycle-by-cycle Peak Current Limitation features ultra low quiescent operating to achieve high  Short Circuit Protection efficiency under light load. And the internal soft-start limits inrush current during power on.  Thermal Shutdown and Auto Recovery  RoHS Compl