Datasheet

FPF2193/4/5 • Rev. 1.0.8 12

FPF2193 / FPF2194 / FPF2195 — Full Function Load Switch with Adjustable Current Limit

This is more power than the package can dissipate, but

the thermal shutdown of the part activates to protect the

part from damage due to excessive heating. When

using the FPF2194, attention must be given to the

manual resetting of the part. The junction temperature is

only able to increase to the thermal shutdown threshold.

Once this temperature has been reached, toggling ON

does not turn the switch on until the junction

temperature drops. For the FPF2195, a short on the

output causes the part to operate in a constant-current

state, dissipating a worst-case power of:

W25.85.15.5

(max)I(max)V(max)P

LIMIN





(5)

This large amount of power activates the thermal

shutdown and the part cycles in and out of thermal

shutdown as long as the ON pin is active and the short

is present.

Board Layout

For best performance, all traces should be as short as

possible. To be most effective, the input and output

capacitors should be placed close to the device to

minimize the effects that parasitic trace inductances

may have on normal and short-circuit operation. Using

wide traces for V

, V

OUT

, and GND help to minimize

parasitic electrical effects along with minimizing the

case-to-ambient thermal impedance.