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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 5
Electrical Characteristics
IN = 1.8 to 5.5V, T
A
= -40 to +85°C unless otherwise noted. Typical values are at IN = 3.3V and T
A
= 25°C.
Note:
5. FPF2303 has a 10ms startup FLAGB blanking time when the part is turned on via the ON pin to ensure transient load currents settle.
Figure 6. Timing Diagram
Symbol Parameter Conditions Min. Typ. Max. Units
Basic Operation
V
IN
Operating Voltage 1.8 5.5 V
I
Q
Quiescent Current IN = 5.5V, V
ONA
= V
ONB
= 0V, I
OUT
= 0mA 52.5 94.5 μA
I
SD
IN Shutdown Current
V
ONA
= V
ONB
= 5.5V, IN = 5.5V
OUTA = OUTB = Short to GND,
3 μA
R
ON
On Resistance
IN = 5.5V, I
OUT
= 200mA, T
A
= 25°C 75 140
mΩ
IN = 5.5V, I
OUT
= 200mA, T
A
= -40°C to 85°C 90
V
IH
ON Input Logic High Voltage (ON)
IN = 1.8V 0.8
V
IN = 5.5V 1.4
V
IL
ON Input Logic Low Voltage
IN = 1.8V 0.5
V
IN = 5.5V 0.9
I
ON
ON Input Leakage V
ON
= IN or GND -1 1 μA
FLAGB Output Logic Low Voltage
IN = 5.5V, I
SINK
= 1mA 0.1 0.2
V
IN = 1.8V, I
SINK
= 1mA 0.15 0.30
FLAGB Output High Leakage Current IN = V
ON
= 5V 1 μA
Protections
I
LIM
Current Limit IN = 3.3V, V
OUTA
= V
OUTB
= 3V, T
A
= 25°C 1.1 1.3 1.5 A
TSD Thermal Shutdown
Shutdown Threshold 140
°CReturn from Shutdown 130
Hysteresis 10
V
UVLO
Under-Voltage Shutdown IN Increasing 1.55 1.65 1.75 V
V
UVLO_HYS
Under-Voltage Shutdown Hysteresis 50 mV
Dynamic
t
ON
Turn-On Time R
L
= 500Ω, C
L
= 0.1μF 113.5 μs
t
OFF
Turn-Off Time R
L
= 500Ω 6 μs
t
R
OUTA, OUTB Rise Time R
L
= 500Ω, C
L
= 0.1μF13.5μs
t
BLANK
Over-Current Blanking Time FPF2300, FPF2302 5 10 20 ms
t
RSTRT_BLANK
Startup FLAGB Blanking Time FPF2303
(5)
51020ms
t
RSRT
Auto-Restart Time FPF2300 504 ms
t
CLR
Current Limit Response Time IN = 3.3V, Moderate Over-Current Condition 20 μs
90%
10%
90%
10%
50% 50%
10%
90%
t
R
t
DON
t
DOFF
OUT
t
F
OUT
ON
t
ON
= t
R
+ t
DON
t
OFF
= t
F
+ t
DOFF