FPF2194_12 Datasheet, PDF (1/14 Pages) Fairchild Semiconductor – Full-Function Load Switch with Adjustable Current Limit

December 2012
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 mΩ current-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 is 100 mA.
These parts are available in a space-saving six ball
advanced 1 x 1.5 mm WLCSP package.
Ordering Information
Part
Number
FPF2193
FPF2194
FPF2195
Current
Limit [mA]
100-1500
Current Limit Blanking
Time [ms]
15/30/60
15/30/60
0
Auto-Restart
Time [ms]
225/450/900
NA
NA
ON Pin
Activity
Active HIGH
Top Mark
S6
S7
S9
© 2009 Fairchild Semiconductor Corporation
FPF2193/4/5 • Rev. 1.0.5
www.fairchildsemi.com