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FS8853-15CV Datasheet(PDF) 10 Page - List of Unclassifed Manufacturers |
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FS8853-15CV Datasheet(HTML) 10 Page - List of Unclassifed Manufacturers |
10 / 13 page FS8853 300mA LDO Linear Regulator Fortune Semiconductor Co. TEL : +886-2-2809-4742 10/13 TD-0405006 Rev. 1.5 http://www.fsc.com.tw FAX: +886-2-2809-4874 package is mounted on a double sided printed circuit board with two square inches of copper allocated for “heat spreading”, the resulting θJA is 180 °C/W. Based on a maximum operating junction temperature 125 °C with an ambient of 25°C, the maximum power dissipation will be: () () W T T P CA JC A J MAX 555 . 0 180 25 125 = − = + − = θ θ Thermal characteristics were measured using a double sided board with 1” x 2” square inches of copper area connected to the GND pin for “heat spreading”. Input-Output Voltage A regulator’s minimum input-output voltage differential, or dropout voltage, determines the lowest usable supply voltage. In battery-powered systems, this will determine the useful end-of-life battery voltage. The FS8853 uses a P-channel MOSFET pass transistor, its dropout voltage is a function of drain-to-source on-resistance (RDS(ON)) multiplied by the load current. VDROPOUT = VIN-VOUT = RDS(ON) x IOUT |
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