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FPF2148 Datasheet

Full Function Load Switch

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FPF2148 pdf
Full Function Load Switch
„ 1.8 to 5.5V Input Voltage Range
„ Controlled Turn-On
„ 200mA Current Limit Options
„ Undervoltage Lockout
„ Thermal Shutdown
„ <2µA Shutdown Current
„ Fast Current limit Response Time
„ 5µs to Moderate Over Currents
„ 30ns to Hard Shorts
„ Fault Blanking
„ Power Good Function
„ RoHS Compliant
„ PDAs
„ Cell Phones
„ GPS Devices
„ MP3 Players
„ Digital Cameras
„ Peripheral Ports
„ Hot Swap Supplies
November 2008
General Description
The FPF2148 is a load switch which provides full protection to
systems and loads which may encounter large current
conditions. These devices contain a 0.12current-limited
P-channel MOSFET which can operate over an input voltage
range of 1.8-5.5V. Switch control is by a logic input (ONB)
capable of interfacing directly with low voltage control signals.
The part contains thermal shutdown protection which shuts off
the switch to prevent damage to the part when a continuous
over-current condition causes excessive heating.
When the switch current reaches the current limit, the part
operates in a constant-current mode to prohibit excessive
currents from causing damage. For the FPF2148, a current limit
condition will immediately pull the fault signal pin low and the
part will remain in the constant-current mode until the switch
current falls below the current limit. The minimum current limit is
The part is available in a space-saving 6 pin 2X2 MLP package.
Pin 1
Ordering Information
Current Limit
Current Limit
Blanking Time
Active LO
©2008 Fairchild Semiconductor Corporation
FPF2148 Rev. H
Fairchild Semiconductor
Fairchild Semiconductor

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