RT9742

® RT9742 70mΩ/55mΩ, 3A/2.5A/2A/1.5A/1A/0.5A High-Side Power Switches with Flag General Description The RT9742 is a cost-effective, low-voltage, single N-MOSFET high-side Power Switch IC for USB application. Low switch-on resistance and low supply current are realized in this IC. The RT9742 integrates an over-current protection circuit, a short fold back circuit, a thermal shutdown circuit and an under-voltage lockout circuit for overall protection. Besides, a flag output is available to indicate fault conditions to the local USB controller. Furthermore, the chip also integrates an embedded delay function to prevent miss-operation from happening due to inrush-current. The RT9742 is an ideal solution for USB power supply and can support flexible applications since it is available in TSOT-23-5, TSOT-23-5 (FC) and SOT-23-3 package. Features  70mΩ/55mΩ (typ.) N-MOSFET Switch  Operating Range : 2.7V to 6V  Reverse Blocking Current  Under Voltage Lockout  Deglitched Fault Report (FLG)  Thermal Protection with Fold-back  Over Current Protection  Short Circuit Protection  UL Approved−E219878  Nemko Approved-NO109777 Applications  USB Peripherals  Notebook PCs Pin Configuration VIN EN/EN 5 4 2 3 VOUT GND FLG TSOT-23-5 / TSOT-23-5 (FC) (TOP VIEW) VOUT EN VOUT VIN 5 4 5 4 2 3 2 3 VOUT GND VIN EN GND FLG TSOT-23-5 For RT9742M/V only TSOT-23-5 For RT9742U only Simplified Application Circuit Supply Voltage 2.7V to 6V VIN FLG CIN RT9742 USB Cont...