Fairchild FPF2107 Intellimax advanced load management product Datasheet

FPF2100-FPF2107
IntelliMAX™ Advanced Load Management Products
General Description
Features
The FPF2100 through FPF2107 is a family of load switches
which provide full protection to systems and loads which may
encounter large current conditions. These devices contain a
0.125Ω current-limited P-channel MOSFET which can operate
over an input voltage range of 1.8-5.5V. Switch control is by a
logic input (ON) capable of interfacing directly with low voltage
control signals. Each part contains thermal shutdown protection
which shuts off the switch to prevent damage to the part when a
continuous over-current condition causes excessive heating.
1.8 to 5.5V Input Voltage Range
Controlled Turn-On
200mA and 400mA Current Limit Options
Undervoltage Lockout
Thermal Shutdown
<1uA Shutdown Current
Auto restart
Fast Current limit Response Time
When the switch current reaches the current limit, the part
operates in a constant-current mode to prohibit excessive
currents from causing damage. For the FPF2100-FPF2102 and
FPF2104-FPF2106, if the constant current condition still
persists after 10ms, these parts will shut off the switch and pull
the fault signal pin (FLAGB) low. The FPF2100, FPF2101,
FPF2104 and FPF2105, have an auto-restart feature which will
turn the switch on again after 160ms if the ON pin is still active.
The FPF2102 and FPF2106 do not have this auto-restart
feature so the switch will remain off until the ON pin is cycled.
For the FPF2103 and FPF2107, a current limit condition will
immediately pull the fault signal pin low and the part will remain
in the constant-current mode until the switch current falls below
the current limit. For the FPF2100 through FPF2103, the
minimum current limit is 200mA while that for the FPF2104
through FPF2107 is 400mA.
3us to Moderate Over Currents
20ns to Hard Shorts
Fault Blanking
Applications
PDAs
Cell Phones
GPS Devices
MP3 Players
Digital Cameras
Peripheral Ports
Hot Swap Supplies
These parts are available in a space-saving 5 pin SOT23
package.
Typical Application Circuit
TO LOAD
VOUT
VIN
FPF2100 - FPF2107
OFF ON
ON
FLAGB
GND
©2005 Fairchild Semiconductor Corporation
FPF2100-FPF2107 Rev. D2
1
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FPF2100-FPF2107 IntelliMAX™ Advanced Load Management Products
May 2005
VIN
UVLO
CONTROL
LOGIC
ON
CURRENT
LIMIT
VOUT
THERMAL
SHUTDOWN
FLAGB
GND
Pin Configuration
VIN 1
GND
2
ON
3
5
VOUT
4
FLAGB
SOT23-5
Pin Description
Pin
Name
1
VIN
2
GND
3
ON
4
FLAGB
5
VOUT
FPF2100-FPF2107 Rev. D2
Function
Supply Input: Input to the power switch and the supply voltage for the IC
Ground
ON Control Input
Fault Output: Active LO, open drain output which indicates an over current supply,
under voltage or over temperature state.
Switch Output: Output of the power switch
2
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FPF2100-FPF2107 IntelliMAX™ Advanced Load Management Products
Functional Block Diagram
Parameter
Min.
VIN, VOUT, ON, FLAGB to GND
Max.
-0.3
Power Dissipation @ TA = 25°C (note 1)
Unit
6
V
667
mW
Operating Junction Temperature
-40
125
°C
Storage Temperature
-65
150
°C
150
°C/W
Thermal Resistance, Junction to Ambient
Electrostatic Discharge Protection
HBM
4000
V
MM
400
V
Recommended Operating Range
Parameter
Min.
Max.
Unit
VIN
1.8
5.5
V
Ambient Operating Temperature, TA
-40
85
°C
Electrical Characteristics
VIN = 1.8 to 5.5V, TA = -40 to +85°C unless otherwise noted. Typical values are at VIN = 3.3V and TA = 25°C.
Parameter
Symbol
Conditions
Min.
Typ.
Max
Units
5.5
V
Basic Operation
Operating Voltage
VIN
Quiescent Current
IQ
1.8
IOUT = 0mA
VIN = 1.8 to 3.3V
95
Von active
VIN = 3.3 to 5.5V
110
Shutdown Current
ISHDN
Latch-Off Current (note 2)
ILATCHOFF
VON = VIN, after an overcurrent fault
50
On-Resistance
RON
TA = 25°C, IOUT = 50mA
125
TA = -40 to +85°C, IOUT = 50mA
150
ON Input Logic High Voltage
ON Input Logic Low Voltage
VIH
VIL
ON Input Leakage
Off Switch Leakage
ISWOFF
FLAGB Output Logic Low Voltage
FLAGB Output High Leakage Current
A
200
1
VIN = 1.8V
0.75
VIN = 5.5V
1.30
A
A
160
m
V
VIN = 1.8V
0.5
VIN = 5.5V
1.0
V
VON = VIN or GND
1
A
VON = 0V, VOUT = 0V
1
A
V
VIN = 5V, ISINK = 10mA
0.1
0.2
VIN = 1.8V, ISINK = 10mA
0.15
0.3
VIN = 5V, Switch on
1
A
mA
Protections
Current Limit
Thermal Shutdown
FPF2100-FPF2107 Rev. D2
ILIM
VIN = 3.3V,
VOUT = 3.0V
FPF2100,
FPF2101,
FPF2102,
FPF2103
200
300
400
FPF2104,
FPF2105,
FPF2106,
FPF2107
400
600
800
Shutdown Threshold
140
Return from Shutdown
130
Hysteresis
10
3
°C
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FPF2100-FPF2107 IntelliMAX™ Advanced Load Management Products
Absolute Maximum Ratings
VIN = 1.8 to 5.5V, TA = -40 to +85°C unless otherwise noted. Typical values are at VIN = 3.3V and TA = 25°C.
Parameter
Symbol
Conditions
Min.
Typ.
Max
1.5
1.6
1.7
Units
Protections
Under Voltage Shutdown
UVLO
VIN Increasing
Under Voltage Shutdown Hysteresis
V
47
mV
Dynamic
Turn on time
tON
RL=500 , CL=0.1uF
25
s
Turn off time
tOFF
RL=500 , CL=0.1uF
50
s
VOUT Rise Time
tR
RL=500 , CL=0.1uF
12
s
VOUT Fall Time
tF
RL=500 , CL=0.1uF
Over Current Blanking Time
tBLANK
FPF2100, FPF2101, FPF2102,
FPF2104, FPF2105, FPF2106
5
10
20
ms
Auto-Restart Time
tRSTRT
FPF2100, FPF2101, FPF2104,
FPF2105
80
160
320
ms
Short Circuit Response Time
136
s
VIN = VON = 3.3V. Moderate
Over-Current Condition.
3
s
VIN = VON = 3.3V. Hard Short.
20
ns
Note 1: Package power dissipation on 1square inch pad, 2 oz copper board.
Note 2: Applicable only to FPF2102 and FPF2106. Latchoff current does not include current flowing into FLAGB.
FPF2100-FPF2107 Rev. D2
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FPF2100-FPF2107 IntelliMAX™ Advanced Load Management Products
Electrical Characteristics Cont.
150
120
VON = VIN
SUPPLY CURRENT (uA)
SUPPLY CURRENT (uA)
110
100
90
80
70
60
1.5
2
2.5
3
3.5
4
4.5
5
5.5
130
110
-15
10
35
60
85
o
SUPPLY VOLTAGE (V)
TJ, JUNCTION TEMPERATURE ( C)
Figure 1. Quiescent Current vs. Input Voltage
Figure 2. Quiescent Current vs. Temperature
500
SUPPLY CURRENT (nA)
600
SUPPLY CURRENT (nA)
VIN = 1.8V
70
I_SHDN
500
400
VIN = 5.5V
300
200
VIN = 3.3V
100
-15
10
35
60
I_SWOFF
400
300
VIN = 5.5V
200
VIN = 3.3V
100
0
-40
85
-15
10
35
60
85
o
o
TJ, JUNCTION TEMPERATURE ( C)
TJ, JUNCTION TEMPERATURE ( C)
Figure 3. ISHUTDOWN Current vs. Temperature
Figure 4. ISWITCH-OFF Current vs. Temperature
63
1.4
59
1.2
55
1
FPF2100, 2102, 2103, 2104, 2106, 2107
ON THRESHOLD (V)
SUPPLY CURRENT (uA)
VIN = 3.3V
90
50
-40
6
700
0
-40
VIN = 5.5V
VIN = 5.5V
51
47
VIN = 3.3V
43
39
35
-40
0.8
FPF2101, 2105
0.6
0.4
0.2
-15
10
35
60
0
1.5
85
o
2
2.5
3
3.5
4
TJ, JUNCTION TEMPERATURE ( C)
VIN, INPUT VOLTAGE (V)
Figure 5. ILATCHOFF vs. Temperature
Figure 6. VIH vs. VIN
FPF2100-FPF2107 Rev. D2
5
4.5
5
5.5
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FPF2100-FPF2107 IntelliMAX™ Advanced Load Management Products
Typical Characteristics
700
700
600
FPF2104 - FPF2107
OUTPUT CURRENT (mA)
OUTPUT CURRENT (mA)
600
500
400
300
FPF2100 - FPF2103
200
400
300
FPF2100 - FPF2103
200
100
0
0.3
0.6
0.9
1.2
1.5
1.8
2.1
2.4
2.7
100
-40
3
-15
85
Figure 7. Current Limit vs. Output Voltage
Figure 8. Current Limit vs. Temperature
150
180
140
160
130
120
VIN = 5.5V
100
80
60
-40
90
2
3
4
5
VIN = 3.3V
120
100
1
VIN = 1.8V
140
110
6
-15
60
85
60
85
Figure 10. R(ON) vs. Temperature
1000
TURN-ON/OFF TIMES (uS)
ILOAD = 10mA
VCC = 3.3V
TD(OFF)
TD(ON)
10
35
TJ, JUNCTION TEMPERATURE ( C)
Figure 9. R(ON) vs. VIN
-15
10
o
VIN, INPUT VOLTAGE (V)
TURN-ON/OFF TIMES (uS)
60
o
200
10
-40
35
TJ, JUNCTION TEMPERATURE ( C)
160
100
10
VIN-VOUT (V)
RON (mOhms)
R(ON) (mOhms)
FPF2104 - FPF2107
500
35
60
ILOAD = 10mA
VCC = 3.3V
T(FALL)
100
T(RISE)
10
1
-40
85
o
-15
10
35
o
TJ, JUNCTION TEMPERATURE ( C)
TJ, JUNCTION TEMPERATURE ( C)
Figure 11. TON/TOff vs. Temperature
Figure 12. TRISE/TFALL vs. Temperature
FPF2100-FPF2107 Rev. D2
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FPF2100-FPF2107 IntelliMAX™ Advanced Load Management Products
Typical Characteristics
180
11
160
10
RESTART TIME (mS)
FLAG-BLANKING TIME (mS)
12
9
8
7
6
5
4
-40
140
120
100
80
60
40
20
-15
10
35
60
0
-40
85
o
-15
10
35
60
TJ, JUNCTION TEMPERATURE ( C)
Figure 13. TBLANK vs Temperature
Figure 14. TRESTART vs Temperature
VDRV3
2V/DIV
VDRV3
2V/DIV
VOUT
2V/DIV
VOUT
2V/DIV
IOUT
200mA/DIV
IOUT
200mA/DIV
VFLAGB
2V/DIV
VFLAGB
2V/DIV
5mS/DIV
20mS/DIV
Figure 15. TBLANK Response
Figure 16. TRESTART Response
RL = 500Ω, CL = 0.1uF
VON
2V/DIV
RL = 500Ω, CL = 0.1uF
VON
2V/DIV
IOUT
10mA/DIV
IOUT
10mA/DIV
100uS/DIV
200nS/DIV
Figure 17. TON Response
FPF2100-FPF2107 Rev. D2
85
o
TJ, JUNCTION TEMPERATURE ( C)
Figure 18. TOFF Response
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FPF2100-FPF2107 IntelliMAX™ Advanced Load Management Products
Typical Characteristics
VIN
2V / DIV
VIN = VON
CIN = 10uF
COUT = 0.1uF
VIN/VON
2V/DIV
IOUT
5A/DIV
IOUT
200mA/DIV
VOUT
2V/DIV
20uS/DIV
50uS/DIV
Figure 19. Short Circuit Response Time
(Output Shorted to GND)
Figure 20. Current Limit Response
(Switch power up to hard short)
VIN
2V/DIV
VON
2V/DIV
IOUT
200mA/DIV
50uS/DIV
Figure 21. Current Limit Response Time
(Output Shorted to GND by 10Ω, moderate short)
Note 3: VDRV signal forces the device to go into overcurrent condition.
FPF2100-FPF2107 Rev. D2
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FPF2100-FPF2107 IntelliMAX™ Advanced Load Management Products
Typical Characteristics
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. For the FPF2100-FPF2103 the minimum
current is 200mA and the maximum current is 400mA and for
the FPF2104-FPF2107 the minimum current is 400mA and the
maximum current is 800mA. The FPF2100-FPF2103 have a
blanking time of 10ms, nominally, during which the switch will
act as a constant current source. At the end of the blanking
time, the switch will be turned-off and the FLAGB pin will
activate to indicate that current limiting has occurred. The
FPF2103 and FPF2107 have no current limit blanking period so
immediately upon a current limit condition FLAGB is activated.
These parts will remain in a constant current state until the ON
pin is deactivated or the thermal shutdown turns-off the switch.
The FPF2100-FPF2107 are current limited switches that protect
systems and loads which can be damaged or disrupted by the
application of high currents. The core of each device is a
0.125Ω P-channel MOSFET and a controller capable of
functioning over a wide input operating range of 1.8-5.5V. The
controller protects against system malfunctions through current
limiting, under-voltage lockout and thermal shutdown. The
current limit is preset for either 200mA or 400mA.
On/OffControl
The ON pin controls the state of the switch. Active HI and LO
versions are available. Refer to the Ordering Information for
details. Activating ON continuously holds the switch in the on
state so long as there is no fault. For all versions, an
under-voltage on VIN or a junction temperature in excess of
150°C overrides the ON control to turn off the switch. In
addition, excessive currents will cause the switch to turn off in
FPF2100-FPF2102 and FPF2104-FPF2107. The FPF2100,
FPF2101, FPF2104 and FPF2105 have an Auto-Restart feature
which will automatically turn the switch on again after 160ms.
For the FPF2102 and FPF2106, the ON pin must be toggled to
turn-on the switch again. The FPF2103 and FPF2107 do not
turn off in response to a over current condition but instead
remain operating in a constant current mode so long as ON is
active and the thermal shutdown or under-voltage lockout have
not activated.
The under-voltage lockout turns-off the switch if the input
voltage drops below the under-voltage lockout threshold. With
the ON pin active the input voltage rising above the
under-voltage lockout threshold will cause a controlled turn on
of the switch which limits current over-shoots.
Fault Reporting
Thermal Shutdown
Upon the detection of an over-current, an input under-voltage,
or an over-temperature condition, the FLAGB signals the fault
mode by activating LO. For the FPF2100-FPF2102 and
FPF2104-FPF2106, the FLAGB goes LO at the end of the
blanking time while FLAGB goes LO immediately for the
FPF2103 and FPF2107. FLAGB remains LO through the
Auto-Restart Time for the FPF2100, FPF2101 FPF2104 and
FPF2105. For the FPF2102 and FPF2106, FLAGB is latched
LO and ON must be toggled to release it.With the FPF2103 and
FPF2107, FLAGB is LO during the faults and immediately
returns HI at the end of the fault condition. FLAGB is an
open-drain MOSFET which requires a pull-up resistor between
VIN and FLAGB. During shutdown, the pull-down on FLAGB is
disabled to reduce current draw from the supply.
The thermal shutdown protects the part from internally or
externally generated excessive temperatures.
During an
over-temperature condition the FLAGB is activated and the
switch is turned-off. The switch automatically turns-on again if
the temperature of the die drops below the threshold
temperature.
Reverse Voltage
If the voltage at the VOUT pin is larger than the VIN pin, large
curents may flow and can cause permanent damage to the
device. FPF2100-FPF2107 is designed to control current flow
from VIN to VOUT.
Under-Voltage Lockout
Ordering Information
Part
Current Limit
[mA]
Current Limit
Blanking Time
[ms]
Auto-Restart
Time
[ms]
ON Pin
Activity
Top Mark
FPF2100
200
10
160
Active HI
2100
FPF2101
200
10
160
Active LO
2101
FPF2102
200
10
NA
Active HI
2102
FPF2103
200
0
NA
Active HI
2103
FPF2104
400
10
160
Active HI
2104
FPF2105
400
10
160
Active LO
2105
FPF2106
400
10
NA
Active HI
2106
FPF2107
400
0
NA
Active HI
2107
FPF2100-FPF2107 Rev. D2
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FPF2100-FPF2107 IntelliMAX™ Advanced Load Management Products
Description of Operation
Typical Application
LOAD
VOUT
VIN
R1 = 100KΩ
FPF2100 - FPF2107
Battery
1.8V-5.5V
OFF ON
ON
R2 = 499Ω
FLAGB
C2 = 0.1µF
GND
C1 = 10µF
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
between VIN and GND. A 0.1uF ceramic capacitor, CIN, placed
close to the pins is usually sufficient. Higher values of CIN can
be used to further reduce the voltage drop.
If the part goes into current limit the maximum power dissipation
will occur when the output is shorted to ground. For the
FPF2100, FPF2101, FPF2104 and FPF2105, the power
dissipation will scale by the Auto-Restart Time, tRSTRT, and the
Over Current Blanking Time, tBLANK, so that the maximum
power dissipated is typically,
Output Capacitor
tBLANK
∗ VIN(max) ∗ ILIM(max)
tRETRY + tBLANK
10
=
∗ 5.5 ∗ 0.8 = 260mW
10 + 160
P(max) =
A 0.1uF capacitor COUT, should be placed between VOUT and
GND. This capacitor will prevent parasitic board inductances
from forcing VOUT below GND when the switch turns-off. For
the FPF2100-FPF2102 and the FPF2104-FPF2106, the total
output capacitance needs to be kept below a maximum value,
COUT(max), to prevent the part from registering an over-current
When using the FPF2102 and FPF2106 attention must be given
to the manual resetting of the part. Continuously resetting the
part at a high duty cycle when a short on the output is present
can cause the temperature of the part to increase. The junction
temperature will only be allowed to increase to the thermal
shutdown threshold. Once this temperature has been reached,
toggling ON will not turn on the switch until the junction
temperature drops. For the FPF2103 and FPF2107, a short on
the output will cause the part to operate in a constant current
state dissipating a worst case power as calculated in (3) until
the thermal shutdown activates. It will then cycle in and out of
thermal shutdown so long as the ON pin is active and the short
is present.
condition and turning off the switch. The maximum output
capacitance can be determined from the following formula,
C OUT (max) =
I LIM (max) ∗ t BLANK (min)
V IN
(1)
Due to the integral body diode in the PMOS switch, a CIN
greater than COUT is highly recommended. A COUT greater
than CIN can cause VOUT to exceed VIN when the system
supply is removed. This could result in current flow through the
body diode from VOUT to VIN.
Board Layout
Power Dissipation
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 VIN, VOUT and GND will help
minimize parasitic electrical effects along with minimizing the
case to ambient thermal impedance.
During normal operation as a switch, the power dissipation is
small and has little effect on the operating temperature of the
part. The parts with the higher current limits will dissipate the
most power and that will only typically be,
P = (ILIM)2 ∗ RDS = (0.8)2 ∗ 0.125 = 80mW
FPF2100-FPF2107 Rev. D2
(3)
(2)
10
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FPF2100-FPF2107 IntelliMAX™ Advanced Load Management Products
Application Information
FPF2100-FPF2107 IntelliMAX™ Advanced Load Management Products
Dimensional Outline and Pad Layout
FPF2100-FPF2107 Rev. D2
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FPF2100-FPF2107 Rev. D2