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FPF2147FAIRCHILN/a50avaiFull Function Load Switch with Reverse Current Blocking


FPF2147 ,Full Function Load Switch with Reverse Current BlockingGeneral Description„ 1.8 to 5.5V Input Voltage Range The FPF2140/42/43/44/46/47 is a series of load ..
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FPF2147
Full Function Load Switch with Reverse Current Blocking
FPF2140/42/43/44/46/47 Full Function Load Switch with Reverse Current Blocking November 2008 FPF2140/42/43/44/46/47 tm Full Function Load Switch with Reverse Current Blocking Features General Description „ 1.8 to 5.5V Input Voltage Range The FPF2140/42/43/44/46/47 is a series of load switches which provides full protection to systems and loads which may „ Controlled Turn-On encounter large current conditions. These devices contain a „ 200mA and 400mA Current Limit Options 0.12Ω current-limited P-channel MOSFET which can operate „ Undervoltage Lockout over an input voltage range of 1.8-5.5V. Internally, current is „ Thermal Shutdown prevented from flowing when the MOSFET is off and the output „ <2µA Shutdown Current voltage is higher than the input voltage. Switch control is by a logic input (ON) capable of interfacing directly with low voltage „ Auto Restart control signals. Each part contains thermal shutdown protection „ Fast Current limit Response Time which shuts off the switch to prevent damage to the part when a „ 5µs to Moderate Over Currents continuous over-current condition causes excessive heating. „ 30ns to Hard Shorts When the switch current reaches the current limit, the part „ Fault Blanking operates in a constant-current mode to prohibit excessive „ Reverse Current Blocking currents from causing damage. For the FPF2140/42/44/46, if „ Power Good Function the constant current condition still persists after 30ms, the part will shut off the switch and pull the fault signal pin (FLAGB) low. „ RoHS Compliant The FPF2140/44 have an auto-restart feature which will turn the switch on again after 450ms if the ON pin is still active. The Applications FPF2142/46 do not have this auto-restart feature so the switch „ PDAs will remain off until the ON pin is cycled. For the FPF2143/47, a „ Cell Phones current limit condition will immediately pull the fault signal pin low and the part will remain in the constant-current mode until „ GPS Devices the switch current falls below the current limit. The minimum „ MP3 Players current limit is 200mA for the FPF2140/42/43 while that for the „ Digital Cameras FPF2144/46/47 is 400mA. „ Peripheral Ports These parts are available in a space-saving 6 pin 2X2 MLP „ Hot Swap Supplies package. Pin 1 TOP BOTTOM Ordering Information Current Limit Auto-Restart Current Limit ON Pin Part Blanking Time Time [mA] Activity [ms] [ms] FPF2140 200/300/400 15/30/60 225/450/900 Active HI FPF2142 200/300/400 15/30/60 NA Active HI FPF2143 200/300/400 0 NA Active HI FPF2144 400/600/800 15/30/60 225/450/900 Active HI FPF2146 400/600/800 15/30/60 NA Active HI FPF2147 400/600/800 0 NA Active HI ©2008 1 FPF2140/42/43/44/46/47 Rev. I
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