FPF2195 Datasheet PDF
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September 2014
FPF2193 / FPF2194 / FPF2195
Full-Function Load Switch with Adjustable Current Limit
Features
<1.8 to 5.5 V Input Voltage Range
Controlled Turn-On
0.1 to 1.5 A Adjustable Current Limit
Under-Voltage Lockout
Thermal Shutdown
<2 µA Shutdown Current
Auto Restart
Fast Current Limit Response Time
5 µs to Moderate Over Currents
30 ns to Hard Shorts
Fault Blanking
Reverse Current Blocking
Applications
PDAs
Cell Phones
Handheld GPS Devices
Portable Enterprise / Industrial Devices
Digital Cameras
Peripheral Ports and Accessories
Portable Medical Equipment
Hot Swap Supplies
Description
The FPF2193, FPF2194, and FPF2195 form a series of
load switches that provides full protection to systems
and loads that may encounter large current conditions.
These devices contain a 55 mcurrent-limited P-
channel MOSFET that can operate over an input
voltage range of 1.8 to 5.5 V. Internally, current is
prevented from flowing 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 that 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
parts operate in a constant-current mode to prohibit
excessive currents from causing damage. For the
FPF2193 and FPF2194, if the constant current condition
still persists after 30 ms, the parts shut off the switch
and pull the fault signal pin (FLAGB) LOW. The
FPF2193 has an auto-restart feature that turns the
switch on again after 450 ms if the ON pin is still active.
The FPF2194 does not have this auto-restart feature, so
the switch remains off until the ON pin is cycled. The
FPF2195 does not turn off after a current limit fault, but
remains in the constant-current mode indefinitely. The
minimum current limit can be set as low as 45 mA.
These parts are available in a space-saving six ball
advanced 0.98 x 1.48 mm WLCSP package.
Ordering Information
Part Number
Current
Limit [mA]
FPF2193
FPF2194
100-1500
FPF2195
FPF2195BUCX 45-1500
Current Limit Blanking
Time [ms]
15/30/60
15/30/60
0
0
Auto-Restart
Time [ms]
225/450/900
NA
NA
NA
ON Pin
Activity
Active HIGH
Top Mark
S6
S7
S9
SY
© 2009 Fairchild Semiconductor Corporation
FPF2193/4/5 • Rev. 1.0.9
www.fairchildsemi.com

Total : 15 Pages
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