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FPF2300/02/03 — Dual-Output Current Limit Switch
© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com
FPF2300/02/03 • Rev. 1.1.3 9
Typical Characteristics
OUT
2V/DIV
IN = 5V
ON = 3.3V
C
OUT
= 0.1μF
R
L
= 500Ω
ON
2V/DIV
IN
2V/DIV
200μs/DIV
IN = 5V
ON = 3.3V
R
L
= 5Ω
IN
5V/DIV
ON
5V/DIV
200μs/DIV
I
OUT
1A/DIV
C
OUT
= 47μF
C
OUT
= 100μF
C
OUT
= 220μF
C
OUT
= 470μF
Figure 29. Current Limit at Startup with
Different Output Capacitor
Figure 30. Output Voltage at Startup with
Different Output Capacitor
Figure 27. Startup FLAGB Blanking Time (FPF2303)
Figure 25. t
OFF
Response Figure 26. Over-Current Blanking Time (FPF2300/2)
Figure 28. Auto-Restart Time (FPF2300)
2ms/DIV
OUT
5V/DIV
IN = 5V
C
OUT
= 10μF
R
L
= 2.8Ω
ON
2V/DIV
FLAGB
2V/DIV
I
OUT
1A/DIV
t
BLANK
2ms/DIV
OUT
2V/DIV
C
OUT
= 10μF
R
L
= 3.3Ω
ON
2V/DIV
FLAGB
2V/DIV
I
OUT
1A/DIV
t
START_BLANK
100ms/DIV
OUT
5V/DIV
IN = 5V
C
OUT
= 10μF
R
L
= 2.8Ω
ON
2V/DIV
FLAGB
2V/DIV
I
OUT
1A/DIV
t
RSTRT
IN = 5V
ON = 3.3V
R
L
= 5Ω
IN
5V/DIV
ON
5V/DIV
200μs/DIV
OUT
5V/DIV
C
OUT
= 47μFC
OUT
= 220μF
C
OUT
= 100μFC
OUT
= 470μF