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PDF FPF2300 Data sheet ( Hoja de datos )
| Número de pieza | FPF2300 | |
| Descripción | (FPF2300 - FPF2303) Dual-Output Current Limit Switch | |
| Fabricantes | Fairchild Semiconductor | |
| Logotipo |  |
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FPF2300/02/03
Dual-Output Current Limit Switch
June 2009
Features
! 1.8 to 5.5V Input Voltage Range
! Typical RON = 75mΩ at IN = 5.5V
! 1.3A Current Limit (Typical)
! Slew Rate Controlled
! Reversed Current Blocking when Disabled
! ESD Protected, Above 4000V HBM
! Independent Thermal Shutdown
! UVLO
! RoHS Compliant
Applications
! Notebook Computing
! Peripheral USB Ports
! Networking / USB Based Equiptment
Description
The FPF2300/02/03 are dual-channel load switches of
IntelliMAX™ family. The FPF2300/02/03 consist of dual,
independent, current-limited, slew rate controlled, P-
channel MOSFET power switches. Slew rated turn-on
prevents inrush current from glitching supply rails. The
input voltage range operates from 1.8V to 5.5V to fulfill
today's USB device supply requirements. Switch control
is accomplished by a logic input (ON) capable of
interfacing directly with low-voltage control signal.
For the FPF2302, if the constant current condition per-
sists after 10ms, these parts shut down the switch and
pull the fault signal pin (FLAGB) LOW. The FPF2300 has
an auto-restart feature that turns the switch on again
after 504ms if the ON pin is still active. For the FPF2303,
a current limit condition immediately pulls the fault signal
pin LOW and the part remains in the constant-current
mode until the switch current falls below the current limit.
For the FPF2300 through FPF2303, the current limit is
typically 1.3A for each switch to align with notebook
computing applications. FPF2300/02/03 is available in
both SO8 and MLP 3X3mm 8-lead packages.
www.DataSheet4U.com
Figure 1. 8-Lead SOP
Ordering Information
Figure 2. 8-Lead MLP (3x3mm)
Part Number
Minimum
Current
Limit
Current Limit
Blanking Time
Eco
Status
Auto
Restart
ON Pin
Activity
Mode
Package
FPF2300MX 1100mA
10ms
RoHS 504ms Active LOW Restart 8-Lead SO8
FPF2302MX 1100mA
10ms
RoHS N/A Active LOW Latch Off 8-Lead SO8
FPF2303MX 1100mA
0ms
RoHS
N/A
Active LOW
Constant
Current
8-Lead SO8
FPF2300MPX 1100mA
10ms
Green
504
Active LOW
Restart
8-Lead Molded Lead-
less Package (MLP)
FPF2302MPX 1100mA
10ms
Green
N/A
Active LOW
Latch Off
8-Lead Molded Lead-
less Package (MLP)
FPF2303MPX 1100mA
0ms
Green
N/A
Active LOW
Constant 8-Lead Molded Lead-
Current less Package (MLP)
For Fairchild’s definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.
© 2009 Fairchild Semiconductor Corporation
FPF2300/02/03 • Rev. 1.1.3
www.fairchildsemi.com
1 page  
Electrical Characteristics
IN = 1.8 to 5.5V, TA = -40 to +85°C unless otherwise noted. Typical values are at IN = 3.3V and TA = 25°C.
Symbol Parameter
Conditions
Min. Typ. Max. Units
Basic Operation
VIN Operating Voltage
IQ Quiescent Current
ISD IN Shutdown Current
IN = 5.5V, VONA = VONB = 0V, IOUT = 0mA
VONA = VONB = 5.5V, IN = 5.5V
OUTA = OUTB = Short to GND,
1.8 5.5
52.5 94.5
3
V
μA
μA
RON
On Resistance
IN = 5.5V, IOUT = 200mA, TA = 25°C
IN = 5.5V, IOUT = 200mA, TA = -40°C to 85°C
75 140
mΩ
90
IN = 1.8V
VIH ON Input Logic High Voltage (ON) IN = 5.5V
0.8
V
1.4
VIL ON Input Logic Low Voltage
IN = 1.8V
IN = 5.5V
0.5
V
0.9
ION
Protections
ON Input Leakage
FLAGB Output Logic Low Voltage
FLAGB Output High Leakage Current
VON = IN or GND
IN = 5.5V, ISINK = 1mA
IN = 1.8V, ISINK = 1mA
IN = VON = 5V
-1 1 μA
0.1 0.2
0.15 0.30
V
1 μA
ILIM Current Limit
IN = 3.3V, VOUTA = VOUTB = 3V, TA = 25°C
Shutdown Threshold
1.1 1.3 1.5
140
A
TSD
Thermal Shutdown
Return from Shutdown
130 °C
Hysteresis
10
VUVLO
VUVLO_HYS
Dynamic
Under-Voltage Shutdown
Under-Voltage Shutdown Hysteresis
IN Increasing
1.55 1.65 1.75
50
V
mV
tON
tOFF
www.DataSheet4UtR.com
tBLANK
tRSTRT_BLANK
tRSRT
tCLR
Turn-On Time
Turn-Off Time
OUTA, OUTB Rise Time
Over-Current Blanking Time
Startup FLAGB Blanking Time
Auto-Restart Time
Current Limit Response Time
RL = 500Ω, CL = 0.1μF
RL = 500Ω
RL = 500Ω, CL = 0.1μF
FPF2300, FPF2302
FPF2303(5)
FPF2300
IN = 3.3V, Moderate Over-Current Condition
113.5
6
13.5
5 10 20
5 10 20
504
20
μs
μs
μs
ms
ms
ms
μs
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.
OUT 10% 90%
90%
10%
tR tF
ON 50%
50%
© 2009 Fairchild Semiconductor Corporation
FPF2300/02/03 • Rev. 1.1.3
OUT
10%
90%
tDON
tDOFF
tON = tR + tDON
tOFF = tF + tDOFF
Figure 6. Timing Diagram
5
www.fairchildsemi.com
5 Page 
Description of Operation
The FPF2300, FPF2302, and FPF2303 are dual-output current-
limit switches designed to meet notebook computer, peripheral
USB port, and point-of-load (POL) application power requirements.
Dual-output current can be used where dual or quad USB ports are
powered by hosts or self-powered hubs. The FPF230X family
offers control and protection while providing optimum operation
current for a safe design practice. The core of each switch is a
typical 75mΩ (IN = 5.5V) P-channel MOSFET and a controller
capable of functioning over an input operating range of 1.8-5.5V.
The FPF230X family offers current limiting, UVLO (under-voltage
lockout), and thermal shutdown protection per each switch. In the
event of an over-current condition, the load switch limits the load to
current limit value. The minimum current limit is set to 1100mA.
On/Off Control
The ON pin is active LOW for FPF2300/2/3 and controls the state
of the switch. Pulling the ON pin continuous to LOW holds the
switch in the ON state. The switch moves into the OFF state when
the ON pin is pulled HIGH or if a fault is encountered. For all
versions, an under-voltage on input voltage or a junction
temperature in excess of 140°C overrides the ON control to turn off
the switch. In addition, excessive currents cause the switch to turn
off in the FPF2300 and FPF2302 after a 10ms blanking time. The
FPF2300 has an auto-restart feature that automatically turns the
switch ON again after 504ms. For the FPF2302, the ON pin must
be toggled to turn on the switch again. The FPF2303 does not turn
off in response to an over-current condition, but remains operating
in a constant-current mode as long as ON is enabled and the
thermal shutdown or UVLO is not activated. The ON pin does not
have a pull-down or pull-up resistor and should not be left floating.
Current Limiting
The current limit ensures that the current through the switch
doesn't exceed a maximum value, while not limiting at less than a
minimum value. FPF230X family has dual-output load switches
being housed in one package. The minimum current at which both
switches start limiting the load current is set to 1100mA. The
FPF2300 and FPF2302 have a blanking time of 10ms (typical),
during which the switch acts as a constant current source. At the
www.DateanSdhoefetth4eUb.claonmking time, the switch is turned off. The FPF2303 has
no current limit blanking period, so it remains in a constant current
state until the ON pin of the affected switch is deactivated or the
thermal shutdown turns off the switch.
Fault Reporting
Over-current, input under-voltage, and over-temperature fault
conditions are signaled out by the FLAGB pin going LOW. A UVLO
fault is reported on both FLAGB(A) and FLAGB(B) simultaneously,
while over-current and over-temperature condition faults are
reported independently. FPF2300 and FPF2302 have a current
fault blanking feature that prevents over-current faults shorter than
the blanking time (tBLANK(Typ) = 10ms) from triggering the fault
signal (FLAGB) output.
If the over-current condition persists beyond the blanking time, the
FPF2300 pulls the FLAGB pin LOW and shuts the switch off. If the
ON pin is kept active, an auto-restart feature releases the FLAGB
pin and turns the switch on again after a 504ms auto-restart time
(tRSTRT). If the over-current condition persists beyond the blanking
time, the FPF2302 has a latch-off feature that pulls the FLAGB pin
LOW and shuts the switch off. The switch is kept off and the
FLAGB pin kept LOW until the ON pin is toggled. The FPF2303
responds to an overload condition by immediately pulling the
FLAGB pin LOW and the switch remains in constant current mode
until the output overload condition is removed. The FPF2303 has a
startup blanking feature that prevents current faults related to star-
tup transients from triggering the FLAGB output. The startup blank-
ing feature is effective for the first 10ms (typical) following device
turn-on via ON pin.
The FLAGB outputs are two open-drain MOSFETs that require a
pull-up resistor on each FLAGB pin. FLAGB can be pulled HIGH to
a voltage source other than input supply with maximum 5.5V. A
100KΩ pull-up resistor is recommended. When the ON pin is inac-
tive, the FLAGB is disabled to reduce current draw from the supply.
If the FLAGB is not used, the FLAGB can be connected to ground
on the PCB.
.
ON
device wakeup
IN
FLAGB
device wakeup
OUT
ILOAD
RISE
TIME
90% VOUT
10% VOUT
ILIMIT
Figure 35. FLAGB Assertion in Under-Voltage Fault
ON
VIN
VOUT
ILOAD
RL*ILMIT
ILIMIT
Over
current
condtion
FLAGB
tBLANK
tRSTRT
Figure 36. FPF2300 FLAGB Reports While Entering
into an Over-Current Condition
Note:
6. An over-current condition signal loads the output with a
heavy load current larger than ILIM value.
© 2009 Fairchild Semiconductor Corporation
FPF2300/02/03 • Rev. 1.1.3
11
www.fairchildsemi.com
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet FPF2300.PDF ] | |
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