FPF2106 [FAIRCHILD]
IntelliMAX Advanced Load Management Products; 的IntelliMAX先进负载管理产品
| 型号： | FPF2106 |
| 厂家： | 
FAIRCHILD SEMICONDUCTOR |
| 描述： | IntelliMAX Advanced Load Management Products |
| 文件： | 总12页 (文件大小：431K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
May 2005
FPF2100-FPF2107
IntelliMAX™ Advanced Load Management Products
Features
General Description
¢ 1.8 to 5.5V Input Voltage Range
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.
¢ Controlled Turn-On
¢ 200mA and 400mA Current Limit Options
¢ Undervoltage Lockout
¢ Thermal Shutdown
¢ <1uA Shutdown Current
¢ Auto restart
¢ Fast Current limit Response Time
¢ 3us to Moderate Over Currents
¢ 20ns to Hard Shorts
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.
¢ 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
V
V
OUT
IN
FPF2100 - FPF2107
OFF ON
ON
FLAGB
GND
©2005 Fairchild Semiconductor Corporation
FPF2100-FPF2107 Rev. D2
1
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Functional Block Diagram
V
IN
UVLO
CONTROL
LOGIC
ON
CURRENT
LIMIT
V
OUT
THERMAL
SHUTDOWN
FLAGB
GND
Pin Configuration
V
5
4
V
OUT
1
IN
GND
ON
2
3
FLAGB
SOT23-5
Pin Description
Pin
Name
Function
1
2
3
4
V
IN
Supply Input: Input to the power switch and the supply voltage for the IC
GND
ON
Ground
ON Control Input
FLAGB
Fault Output: Active LO, open drain output which indicates an over current supply,
under voltage or over temperature state.
5
V
Switch Output: Output of the power switch
OUT
2
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FPF2100-FPF2107 Rev. D2
Absolute Maximum Ratings
Parameter
Min.
Max.
6
Unit
V
V
, V
, ON, FLAGB to GND
-0.3
IN
OUT
Power Dissipation @ T = 25°C (note 1)
667
125
150
150
mW
°C
A
Operating Junction Temperature
Storage Temperature
-40
-65
°C
Thermal Resistance, Junction to Ambient
Electrostatic Discharge Protection
°C/W
V
HBM
MM
4000
400
V
Recommended Operating Range
Parameter
Min.
1.8
Max.
5.5
Unit
V
V
IN
Ambient Operating Temperature, T
-40
85
°C
A
Electrical Characteristics
V
=1.8to5.5V,T =-40to+85°Cunlessotherwisenoted. TypicalvaluesareatV =3.3VandT =25°C.
A IN A
IN
Parameter
Symbol
Conditions
Min.
Typ.
Max Units
Basic Operation
Operating Voltage
Quiescent Current
V
1.8
5.5
V
IN
I
I
= 0mA
V
V
= 1.8 to 3.3V
= 3.3 to 5.5V
95
ꢀA
Q
OUT
IN
Von active
110
200
1
IN
Shutdown Current
Latch-Off Current (note 2)
On-Resistance
I
I
ꢀA
ꢀA
SHDN
V
= V , after an overcurrent fault
50
LATCHOFF
ON
IN
R
T = 25°C, I = 50mA
OUT
125
150
160
mꢀ
ON
A
T = -40 to +85°C, I
= 50mA
A
OUT
ON Input Logic High Voltage
ON Input Logic Low Voltage
V
V
V
V
V
V
V
V
V
V
V
= 1.8V
= 5.5V
= 1.8V
= 5.5V
0.75
1.30
V
V
IH
IN
IN
0.5
1.0
1
IL
IN
IN
ON Input Leakage
= V or GND
ꢀA
ꢀA
V
ON
ON
IN
Off Switch Leakage
I
= 0V, V
= 0V
1
SWOFF
OUT
FLAGB Output Logic Low Voltage
= 5V, I
= 10mA
SINK
0.1
0.2
0.3
1
IN
IN
IN
= 1.8V, I
= 10mA
0.15
SINK
FLAGB Output High Leakage Current
Protections
= 5V, Switch on
ꢀA
Current Limit
I
V
V
= 3.3V,
FPF2100,
FPF2101,
FPF2102,
FPF2103
200
400
300
600
400
800
mA
LIM
IN
= 3.0V
OUT
FPF2104,
FPF2105,
FPF2106,
FPF2107
Thermal Shutdown
Shutdown Threshold
Return from Shutdown
Hysteresis
140
130
10
°C
3
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FPF2100-FPF2107 Rev. D2
Electrical Characteristics Cont.
V
= 1.8 to 5.5V, T = -40 to +85°C unless otherwise noted. Typical values are at V = 3.3V and T = 25°C.
IN
A
IN
A
Parameter
Symbol
Conditions
Min.
Typ.
Max Units
Protections
Under Voltage Shutdown
Under Voltage Shutdown Hysteresis
Dynamic
UVLO
V
Increasing
1.5
1.6
47
1.7
V
IN
mV
Turn on time
t
t
t
t
t
RL=500ꢁ, CL=0.1uF
RL=500ꢁ, CL=0.1uF
RL=500ꢁ, CL=0.1uF
RL=500ꢁ, CL=0.1uF
25
50
ꢀs
ꢀs
ꢀs
ꢀs
ms
ON
OFF
R
Turn off time
V
V
Rise Time
Fall Time
12
OUT
OUT
136
10
F
Over Current Blanking Time
FPF2100, FPF2101, FPF2102,
FPF2104, FPF2105, FPF2106
5
20
BLANK
Auto-Restart Time
t
FPF2100, FPF2101, FPF2104,
FPF2105
80
160
3
320
ms
ꢀs
ns
RSTRT
Short Circuit Response Time
V
= V = 3.3V. Moderate
IN ON
Over-Current Condition.
V
= V = 3.3V. Hard Short.
20
IN
ON
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.
4
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FPF2100-FPF2107 Rev. D2
Typical Characteristics
120
150
130
110
90
VON = V
IN
110
100
90
VIN = 5.5V
VIN = 3.3V
80
VIN = 1.8V
70
70
50
60
-40
-15
TJ, JUNCTION TEMPERATURE (oC)
Figure 2. Quiescent Current vs. Temperature
10
35
60
85
1.5
2
2.5
3
3.5
SUPPLY VOLTAGE (V)
Figure 1. Quiescent Current vs. Input Voltage
4
4.5
5
5.5
6
700
600
500
400
300
200
100
0
500
400
300
200
100
0
I_SWOFF
I_SHDN
VIN = 5.5V
VIN = 5.5V
VIN = 3.3V
VIN = 3.3V
-40
-15
10
TJ, JUNCTION TEMPERATURE (oC)
Figure 4. I Current vs. Temperature
35
60
85
-40
-15
10
35
60
85
TJ, JUNCTIONTEMPERATURE (oC)
Figure 3. I
Current vs. Temperature
SHUTDOWN
SWITCH-OFF
63
59
55
51
47
43
39
35
1.4
1.2
1
FPF2100, 2102, 2103, 2104, 2106, 2107
VIN = 5.5V
FPF2101, 2105
0.8
0.6
0.4
0.2
0
VIN = 3.3V
-40
-15
10
TJ, JUNCTION TEMPERATURE (oC)
Figure 5. I vs. Temperature
35
60
85
1.5
2
2.5
3
3.5
4
4.5
5
5.5
V , INPUT VOLTAGE (V)
IN
Figure 6. V vs. V
IN
LATCHOFF
IH
5
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FPF2100-FPF2107 Rev. D2
Typical Characteristics
700
700
600
500
400
300
200
100
600
FPF2104 - FPF2107
FPF2104 - FPF2107
500
400
300
FPF2100 - FPF2103
FPF2100 - FPF2103
200
100
0
-40
-15
10
35
60
85
85
85
0.3
0.6
0.9
1.2
1.5
1.8
2.1
2.4
2.7
3
V -VOUT (V)
IN
TJ, JUNCTION TEMPERATURE (oC)
Figure 7. Current Limit vs. Output Voltage
Figure 8. Current Limit vs. Temperature
160
200
180
160
140
120
100
80
150
140
130
120
110
100
90
V
IN = 1.8V
V
IN = 3.3V
VIN = 5.5V
60
-40
-15
10
35
60
1
2
3
4
5
6
TJ, JUNCTION TEMPERATURE (oC)
V , INPUT VOLTAGE (V)
IN
Figure 9. R
vs. V
Figure 10. R vs. Temperature
(ON)
(ON)
IN
100
1000
100
10
ILOAD = 10mA
VCC = 3.3V
ILOAD = 10mA
VCC = 3.3V
T
(FALL)
TD
(OFF)
T
(RISE)
TD
(ON)
10
-40
1
-15
10
35
60
85
-40
-15
10
35
60
TJ, JUNCTION TEMPERATURE (oC)
TJ, JUNCTION TEMPERATURE (oC)
Figure 11. T /T
vs. Temperature
Figure 12. T /T vs. Temperature
ON Off
RISE FALL
6
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FPF2100-FPF2107 Rev. D2
Typical Characteristics
12
11
10
9
180
160
140
120
100
80
8
7
60
6
40
5
20
4
0
-40
-15
10
TJ, JUNCTION TEMPERATURE (oC)
Figure 13. T vs Temperature
35
60
85
-40
-15
10
35
60
85
TJ, JUNCTION TEMPERATURE (oC)
Figure 14. T
vs Temperature
RESTART
BLANK
3
3
V
V
DRV
DRV
2V/DIV
2V/DIV
V
V
OUT
OUT
2V/DIV
2V/DIV
I
I
OUT
OUT
200mA/DIV
200mA/DIV
V
V
FLAGB
FLAGB
2V/DIV
2V/DIV
5mS/DIV
Figure 15. T Response
20mS/DIV
Figure 16. T Response
BLANK
RESTART
R = 500Ω, C = 0.1uF
R = 500Ω, C = 0.1uF
L
L
L
L
V
ON
V
ON
2V/DIV
2V/DIV
I
OUT
I
OUT
10mA/DIV
10mA/DIV
100uS/DIV
Figure 17. T Response
200nS/DIV
Figure 18. T
Response
ON
OFF
7
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FPF2100-FPF2107 Rev. D2
Typical Characteristics
V
= V
ON
IN
C
C
= 10uF
IN
V
IN
2V / DIV
= 0.1uF
OUT
V
/V
IN ON
2V/DIV
I
OUT
5A/DIV
I
OUT
200mA/DIV
V
OUT
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)
V
IN
2V/DIV
V
ON
2V/DIV
I
OUT
200mA/DIV
50uS/DIV
Figure 21. Current Limit Response Time
(Output Shorted to GND by 10Ω, moderate short)
Note 3: V
signal forces the device to go into overcurrent condition.
DRV
8
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FPF2100-FPF2107 Rev. D2
Current Limiting
Description of Operation
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
Reverse Voltage
under-voltage on V or a junction temperature in excess of
IN
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.
If the voltage at the V
pin is larger than the V pin, large
OUT IN
curents may flow and can cause permanent damage to the
device. FPF2100-FPF2107 is designed to control current flow
from V to V
.
IN
OUT
Under-Voltage Lockout
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.
Ordering Information
Current Limit
Auto-Restart
Current Limit
[mA]
Blanking Time
[ms]
Time
[ms]
ON Pin
Activity
Part
Top Mark
2100
FPF2100
FPF2101
FPF2102
FPF2103
FPF2104
FPF2105
FPF2106
FPF2107
200
200
200
200
400
400
400
400
10
10
10
0
160
160
NA
Active HI
Active LO
Active HI
Active HI
Active HI
Active LO
Active HI
Active HI
2101
2102
NA
2103
10
10
10
0
160
160
NA
2104
2105
2106
NA
2107
9
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FPF2100-FPF2107 Rev. D2
Application Information
Typical Application
LOAD
V
V
OUT
IN
R1 = 100KΩ
C2 = 0.1µF
FPF2100 - FPF2107
Battery
1.8V-5.5V
R2 = 499Ω
OFF ON
C1 = 10µF
ON
FLAGB
GND
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
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
between V and GND. A 0.1uF ceramic capacitor, C , placed
IN
IN
dissipation will scale by the Auto-Restart Time, t
, and the
RSTRT
close to the pins is usually sufficient. Higher values of C can
IN
Over Current Blanking Time, t
power dissipated is typically,
, so that the maximum
BLANK
be used to further reduce the voltage drop.
Output Capacitor
t
BLANK
P(max) =
∗ VIN(max)∗ILIM(max)
A 0.1uF capacitor C
, should be placed between V
and
OUT
OUT
t
RETRY + tBLANK
10
GND. This capacitor will prevent parasitic board inductances
from forcing V below GND when the switch turns-off. For
(3)
OUT
=
∗5.5∗0.8 = 260mW
10 +160
the FPF2100-FPF2102 and the FPF2104-FPF2106, the total
output capacitance needs to be kept below a maximum value,
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.
C
(max), to prevent the part from registering an over-current
OUT
condition and turning off the switch. The maximum output
capacitance can be determined from the following formula,
I
LIM (max) ∗ tBLANK (min)
(1)
C
OUT (max) =
V
IN
Due to the integral body diode in the PMOS switch, a C
greater than C
than C can cause V
supply is removed. This could result in current flow through the
body diode from V to V
IN
is highly recommended.
A
C
greater
OUT
OUT
to exceed V when the system
IN
OUT
IN
.
IN
OUT
Board Layout
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
Power Dissipation
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
operation. Using wide traces for V , V
and GND will help
IN
OUT
most power and that will only typically be,
minimize parasitic electrical effects along with minimizing the
case to ambient thermal impedance.
P = (ILIM)2 ∗RDS = (0.8)2 ∗0.125 = 80mW
(2)
10
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FPF2100-FPF2107 Rev. D2
Dimensional Outline and Pad Layout
11
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FPF2100-FPF2107 Rev. D2
12
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FPF2100-FPF2107 Rev. D2
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