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FPF2174_08 Datasheet

  • FPF2174_08

  • IntelliMAX⑩ Advanced Load Management Products

  • 12頁

  • FAIRCHILD

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FPF2174 IntelliMAX鈩?Advanced Load Management Products
August 2008
FPF2174
IntelliMAX鈩?Advanced Load Management Products
Features
1.8 to 5.5V Input Voltage Range
Controlled Turn-On
200mA Current Limit Option
Undervoltage Lockout
Thermal Shutdown
<1 A Shutdown Current
Fast Current limit Response Time
3 s to Moderate Over Currents
20ns to Hard Shorts
Integrated very low V
F
Schottky Diode for
Reverse Current Blocking
Integrated Zener Diode for Output Clamp
RoHS Compliant
tm
General Description
The FPF2174 is a load switch which combines the functionality
of the IntelliMAX
TM
series load switch with a very low forward
voltage drop Schottky barrier rectifier and a zener clamp at the
output. The integrated solution provides full protection to
systems and loads which may encounter large current
conditions in a very compact MLP 3x3 package. This device
contain a 0.125 current-limited P-channel MOSFET which can
operate over an input voltage range of 1.8-5.5V. The Schottky
diode acts as a barrier so that no reverse current can flow when
the MOSFET is off and the output voltage is higher than the
input voltage. Switch control is by a logic input (ON) capable of
interfacing directly with low voltage control signals. Each 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. If the constant current condition
still persists after 10ms, these parts will shut off the switch and
pull the fault signal pin (FLAGB) low. The switch will remain off
until the ON pin is cycled. The minimum current limit is 200mA.
These parts are available in a space-saving 6L MLP 3x3
package.
Applications
PDAs
Cell Phones
GPS Devices
MP3 Players
Digital Cameras
Peripheral Ports
Hot Swap Supplies
Typical Application Circuit
TO LOAD
V
IN
V
OUT
FPF2174
OFF ON
ON
GND
FLAGB
Ordering Information
Part
FPF2174
Current Limit
[mA]
200
Current Limit
Blanking Time
[ms]
10
Auto-Restart
Time
[ms]
NA
ON Pin
Activity
Active HI
Top Mark
2174
漏2008 Fairchild Semiconductor Corporation
FPF2174 Rev. D
1
www.fairchildsemi.com

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