RT9702PB/A是低成本单N-MOSFET上壁电源开关 , 适用于自给电及汇流排给电之USB装置 , RT9702PB系列备有charge pump电力以驱动内部MOSFET开关 , 此开关低Rdson 80mΩ符合USB压降规格 , 侦错旗标输出提供USB控制器使用 , 另外还有涌浪电流缓起动 , 过热保护 , 避免开关在重载下损坏 , 过低压保护确保开关能在正常电压下工作 , 极低的25uA静态电流非常适用于以电池为主之移动式产品。
The RT9702PB and RT9702A are cost-effective, low voltage, single N-Channel MOSFET high-side power switches, optimized for self-powered and bus- powered Universal Serial Bus (USB) applications. The RT9702PB/A equipped with a charge pump circuitry to drive the internal MOSFET switch; the switch's low R_DS(ON), 80mΩ, meets USB voltage drop requirements; and a flag output is available to indicate fault conditions to the local USB controller.
Additional features include soft-start to limit inrush current during plug-in, thermal shutdown to prevent catastrophic switch failure from high current loads, under-voltage lockout (UVLO) to ensure that the device remains off unless there is a valid input voltage present, fault current is limited to typically 800mA for RT9702PB in single port and 1.5A for RT9702PBA in dual ports in accordance with the USB power requirements, lower quiescent current as 25μA making this device ideal for portable battery-operated equipment.
The RT9702PB/A is available in SOT-23-5 and TSOT-23-5 packages requiring minimum board space and smallest components.

Note :
Richtek Pb-free and Green products are :
► RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020.
► Suitable for use in SnPb or Pb-free soldering processes.

(TOP VIEW)
SOT-23-5/TSOT-23-5

Note: A low-ESR 150μF aluminum electrolytic or tantalum between VOUT and GND is strongly recommended to meet the330mV maximum droop requirement in the hub VBUS. (see Application Information Section for further details)