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FPF2500-FPF2506 Rev. C4

Application Information

Typical Application

OFF ON

ON

GND

FPF2503-FPF2506

FLAGB

5.5V max

Battery

12V

C1=10uF

C2=1uF

-

5.5V max

OFF ON

ON

GND

FPF2500-FPF2502

ISET

Battery

12V

C1=10uF

RSET

C2=1uF

R2=240

Ω

5.5V max

Setting Current Limit

The FPF2500, FPF2501, and FPF2502 have a current limit

and GND. This resistor is selected by using the following

equation,

application would be the 0.500A current that is required by a

single USB port. Using the table below an appropriate selection

port load could draw 0.525A, but not more than 0.875A.

always deliver at least 1.050A and never more than 1.750A.

Input Capacitor

To limit the voltage drop on the input supply caused by transient

in-rush currents when the switch turns-on into a discharged load

capacitor or a short-circuit, a capacitor needs to be placed

be used to further reduce the voltage drop.

×

e

×

()

×

=

[K

Ω]

Min. Current

Limit

[A]

Typ. Current

Limit

[A]

Max. Current

Limit

[A]

7.87

0.375

0.500

0.625

10.0

0.450

0.600

0.750

12.4

0.525

0.700

0.875

14.7

0.600

0.800

1.000

17.4

0.675

0.900

1.125

20.5

0.750

1.000

1.250

23.2

0.825

1.100

1.375

26.7

0.900

1.200

1.500

30.9

0.975

1.300

1.625

34.8

1.050

1.400

1.750

39.0

1.125

1.500

1.875

43.2

1.200

1.600

2.000

48.7

1.275

1.700

2.125

53.6

1.350

1.800

2.250

29.0

1.425

1.900

2.375

64.9

1.500

2.000

2.500

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