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FPF2100-FPF2107 IntelliMAXTM Advanced Load Management Products
August 2008
FPF2100-FPF2107 IntelliMAXTM Advanced Load Management Products
Features
1.8 to 5.5V Input Voltage Range Controlled Turn-On 200mA and 400mA Current Limit Options Undervoltage Lockout Thermal Shutdown <1A Shutdown Current Auto restart Fast Current limit Response Time 3s to Moderate Over Currents 20ns to Hard Shorts Fault Blanking RoHS Compliant
tm
General Description
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 0.125 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. 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. These parts are available in a space-saving 5 pin SOT23 package.
Applications
PDAs Cell Phones GPS Devices MP3 Players Digital Cameras Peripheral Ports Hot Swap Supplies
Ordering Information
Part
FPF2100 FPF2101 FPF2102 FPF2103 FPF2104 FPF2105 FPF2106 FPF2107
Current Limit [mA]
200 200 200 200 400 400 400 400
Current Limit Blanking Time [ms]
10 10 10 0 10 10 10 0
Auto-Restart Time [ms]
160 160 NA NA 160 160 NA NA
ON Pin Activity
Active HI Active LO Active HI Active HI Active HI Active LO Active HI Active HI
Top Mark
2100 2101 2102 2103 2104 2105 2106 2107
(c)2008 Fairchild Semiconductor Corporation
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FPF2100-FPF2107 Rev. H
FPF2100-FPF2107 IntelliMAXTM Advanced Load Management Products
Typical Application Circuit
TO LOAD VIN VOUT
FPF2100 - FPF2107
OFF ON ON GND FLAGB
Functional Block Diagram
VIN
UVLO
ON
CONTROL LOGIC
CURRENT LIMIT THERMAL SHUTDOWN VOUT FLAGB
GND
Pin Configuration
VIN GND ON 1 2 3 SOT23-5 4 FLAGB 5 VOUT
Pin Description
Pin
1 2 3 4 5
Name
VIN GND ON FLAGB VOUT Ground ON Control Input
Function
Supply Input: Input to the power switch and the supply voltage for the IC
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
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FPF2100-FPF2107 IntelliMAXTM Advanced Load Management Products
Absolute Maximum Ratings
Parameter
VIN, VOUT, ON, FLAGB to GND Power Dissipation @ TA = 25C (note 1) Operating Junction Temperature Storage Temperature Thermal Resistance, Junction to Ambient Electrostatic Discharge Protection HBM MM 4000 400 -40 -65
Min
-0.3
Max
6 667 125 150 150
Unit
V mW C C C/W V V
Recommended Operating Range
Parameter
VIN Ambient Operating Temperature, TA
Min
1.8 -40
Max
5.5 85
Unit
V C
Electrical Characteristics
VIN = 1.8 to 5.5V, TA = -40 to +85C unless otherwise noted. Typical values are at VIN = 3.3V and TA = 25C.
Parameter
Basic Operation Operating Voltage Quiescent Current Shutdown Current Latch-Off Current (note 2) On-Resistance
Symbol
VIN IQ ISHDN ILATCHOFF RON IOUT = 0mA VON active
Conditions
Min Typ Max Units
1.8 5.5 95 110 50 125 150 65 0.75 1.30 0.5 1.0 1 1 10 0.1 0.15 100 0.2 0.3 1 160 200 200 V V A A nA V A m 200 1 V A A A
VIN = 1.8 to 3.3V VIN = 3.3 to 5.5V
VON = VIN, after an overcurrent fault VIN = 3.3V, IOUT = 50mA, TA = 25C VIN = 3.3V, IOUT = 50mA, TA = 85C VIN = 3.3V, IOUT = 50mA, TA = -40C to +85C VIN = 1.8V VIN = 5.5V VIN = 1.8V VIN = 5.5V VON = VIN or GND VON = 0V, VOUT = 0V @ VIN = 5.5V, TA = 85C VON = 0V, VOUT = 0V @ VIN = 3.3V, TA = 25C VIN = 5V, ISINK = 10mA VIN = 1.8V, ISINK = 10mA VIN = 5V, Switch on FPF2100, FPF2101, FPF2102, FPF2103 FPF2104, FPF2105, FPF2106, FPF2107
ON Input Logic High Voltage ON Input Logic Low Voltage ON Input Leakage
VIH VIL
Off Switch Leakage
ISWOFF
FLAGB Output Logic Low Voltage FLAGB Output High Leakage Current Protections
Current Limit
ILIM
VIN = 3.3V, VOUT = 3.0V
200 400
300 600 140 130 10
400 mA 800
Shutdown Threshold Thermal Shutdown Return from Shutdown Hysteresis
C
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FPF2100-FPF2107 IntelliMAXTM Advanced Load Management Products
Electrical Characteristics Cont.
VIN = 1.8 to 5.5V, TA = -40 to +85C unless otherwise noted. Typical values are at VIN = 3.3V and TA = 25C.
Parameter
Protections Under Voltage Shutdown Under Voltage Shutdown Hysteresis Dynamic Turn on time Turn off time VOUT Rise Time VOUT Fall Time Over Current Blanking Time Auto-Restart Time Short Circuit Response Time
Symbol
UVLO VIN Increasing
Conditions
Min Typ Max Units
1.5 1.6 47 1.7 V mV s s s s 20 320 ms ms s ns
tON tOFF tR tF tBLANK tRSTRT
RL = 500, CL = 0.1F RL = 500, CL = 0.1F RL = 500, CL = 0.1F RL = 500, CL = 0.1F FPF2100, FPF2101, FPF2102, FPF2104, FPF2105, FPF2106 FPF2100, FPF2101, FPF2104, FPF2105 VIN = VON = 3.3V. Moderate Over-Current Condition. VIN = VON = 3.3V. Hard Short. 5 80
25 50 12 136 10 160 3 20
Note 1: Package power dissipation on 1 square inch pad, 2 oz. copper board. Note 2: Applicable only to FPF2102 and FPF2106. Latchoff current does not include current flowing into FLAGB.
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FPF2100-FPF2107 IntelliMAXTM Advanced Load Management Products
Typical Characteristics
120 VON = VIN 110 100 90 80 70 60 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 SUPPLY VOLTAGE (V)
SUPPLY CURRENT (uA)
SUPPLY CURRENT (uA)
150
130
110
VIN = 5.5V
VIN = 3.3V
90
70
VIN = 1.8V
50 -40
-15
10
35
o
60
85
TJ, JUNCTION TEMPERATURE ( C)
Figure 1. Quiescent Current vs. Input Voltage
Figure 2. Quiescent Current vs. Temperature
700
500
I_SHDN
600
I_SWOFF SUPPLY CURRENT (nA) 400
SUPPLY CURRENT (nA)
500 400 300 200
300 VIN = 5.5V
VIN = 5.5V
200
VIN = 3.3V
100 0 -40
100
VIN = 3.3V
-15
10
35
60
85
0 -40
-15
10
35
60
85
TJ, JUNCTION TEMPERATURE (oC)
TJ, JUNCTION TEMPERATURE (oC)
Figure 3. ISHUTDOWN Current vs. Temperature
Figure 4. ISWITCH-OFF Current vs. Temperature
63 59 SUPPLY CURRENT (uA)
1.4 1.2
FPF2100, 2102, 2103, 2104, 2106, 2107
VIN = 5.5V 51 47 VIN = 3.3V 43 39 35 -40
ON THRESHOLD (V)
55
1 0.8 0.6 0.4 0.2 0 1.5
FPF2101, 2105
-15
10
35
60
85
2
2.5
3
3.5
4
4.5
5
5.5
TJ, JUNCTION TEMPERATURE (oC)
VIN, INPUT VOLTAGE (V)
Figure 5. ILATCHOFF vs. Temperature
Figure 6. VIH vs. VIN
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FPF2100-FPF2107 IntelliMAXTM Advanced Load Management Products
Typical Characteristics
700 600 OUTPUT CURRENT (mA) 500 400 300 200 100 0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3 VIN-VOUT (V)
OUTPUT CURRENT (mA)
FPF2104 - FPF2107
700 600 500 400 300 200 100 -40
FPF2104 - FPF2107
FPF2100 - FPF2103
FPF2100 - FPF2103
-15
10
35
60
85
TJ, JUNCTION TEMPERATURE (oC)
Figure 7. Current Limit vs. Output Voltage
Figure 8. Current Limit vs. Temperature
160 150 140 R(ON) (mOhms)
RON (mOhms)
200 180 160 140
VIN = 3.3V
VIN = 1.8V
130 120 110 100 90 1 2 3 4 5 6 VIN, INPUT VOLTAGE (V)
120
VIN = 5.5V
100 80 60 -40
-15
10
35
60
85
TJ, JUNCTION TEMPERATURE (oC)
Figure 9. R(ON) vs. VIN
Figure 10. R(ON) vs. Temperature
100
ILOAD = 10mA VCC = 3.3V
1000
ILOAD = 10mA VCC = 3.3V T(FALL)
TURN-ON/OFF TIMES (uS)
TD(OFF) T
OFF
TURN-ON/OFF TIMES (uS)
100
TON TD(ON)
T(RISE)
10
10 -40
-15
10
35
60
85
1 -40
-15
10
35
60
85
TJ, JUNCTION TEMPERATURE (oC)
TJ, JUNCTION TEMPERATURE (oC)
Figure 11. TON/TOFF vs. Temperature
Figure 12. TRISE/TFALL vs. Temperature
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FPF2100-FPF2107 IntelliMAXTM Advanced Load Management Products
Typical Characteristics
12 FLAG-BLANKING TIME (mS) 11 RESTART TIME (mS) -15 10 35 60 85 10 9 8 7 6 5 4 -40 180 160 140 120 100 80 60 40 20 0 -40 -15 10 35 60 85
TJ, JUNCTION TEMPERATURE (oC)
TJ, JUNCTION TEMPERATURE (oC)
Figure 13. TBLANK vs. Temperature
Figure 14. TRESTART vs. Temperature
VDRV3 2V/DIV VOUT 2V/DIV IOUT 200mA/DIV VFLAGB 2V/DIV 5mS/DIV Figure 15. TBLANK Response
VDRV3 2V/DIV VOUT 2V/DIV IOUT 200mA/DIV VFLAGB 2V/DIV 20mS/DIV Figure 16. TRESTART Response
RL = 500, CL = 0.1F Active High Devices VON 2V/DIV VON 2V/DIV
RL = 500, CL = 0.1F Active High Devices
IOUT 10mA/DIV
IOUT 10mA/DIV
100S/DIV Figure 17. TON Response
200nS/DIV Figure 18. TOFF Response
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FPF2100-FPF2107 IntelliMAXTM Advanced Load Management Products
Typical Characteristics
VIN 2V / DIV CIN = 10F COUT = 0.1F VIN/VON 2V/DIV IOUT 5A/DIV VOUT 2V/DIV 20S/DIV Figure 19. Short Circuit Response Time (Output Shorted to GND) IOUT 200mA/DIV VIN = VON Active High Devices
50S/DIV Figure 20. Current Limit Response (Switch power up to hard short)
VIN 2V/DIV
Active High Devices
VON 2V/DIV
IOUT 200mA/DIV 50S/DIV Figure 21. Current Limit Response Time (Output Shorted to GND by 10, moderate short)
Note 3: VDRV signal forces the device to go into overcurrent condition.
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FPF2100-FPF2107 IntelliMAXTM Advanced Load Management Products
Description of Operation
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 0.125 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.
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.
On/Off Control
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 undervoltage on VIN or a junction temperature in excess of 150C overrides the ON control to turn off the switch. In addition, excessive currents will cause the switch to turn off in FPF2100FPF2102 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.
Reverse Voltage
If the voltage at the VOUT pin is larger than the VIN pin, large currents 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
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 undervoltage lockout threshold will cause a controlled turn on of the switch which limits current over-shoots.
Fault Reporting
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 AutoRestart 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 opendrain 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.
Thermal Shutdown
The thermal shutdown protects the part from internally or externally generated excessive temperatures. During an overtemperature 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.
FPF2100-FPF2107 Rev. H
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FPF2100-FPF2107 IntelliMAXTM Advanced Load Management Products
Application Information
Typical Application
VIN Battery 1.8V-5.5V
VOUT
LOAD R1 = 100K R2 = 499 C2 = 0.1F
FPF2100 - FPF2107
OFF ON C1 = 4.7F ON GND FLAGB
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 4.7F ceramic capacitor, CIN, must be placed close to the VIN pin. A higher value of CIN can be used to further reduce the voltage drop experienced as the switch is turned on into a large capacitive load. 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
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 condition and turning off the switch. The maximum output capacitance can be determined from the following formula,
t BLANK P ( max ) = -------------------------------------------------- xV IN ( max ) xI LIM ( max ) t RESTART + t BLANK 10 = ---------------------- x 5.5 x 0.8 = 260mW (3) 10 + 160
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.
I LIM ( max ) x t BLANK ( min ) C OUT ( max ) = ------------------------------------------------------------------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
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.
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 most power and that will only typically be,
P = ( I LIM ) x R DS = ( 0.2 ) x 0.125 = 80mW
2
2
(2)
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FPF2100-FPF2107 IntelliMAXTM Advanced Load Management Products
Dimensional Outline and Pad Layout
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FPF2100-FPF2107 IntelliMAXTM Advanced Load Management Products
TRADEMARKS The following includes registered and unregistered trademarks and service marks, owned by Fairchild Semiconductor and/or its global subsidianries, and is not intended to be an exhaustive list of all such trademarks. Build it NowTM CorePLUSTM CorePOWERTM CROSSVOLTTM CTLTM Current Transfer LogicTM EcoSPARK(R) EfficentMaxTM EZSWITCHTM *
TM
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FPSTM F-PFSTM FRFET(R) Global Power ResourceSM Green FPSTM Green FPSTM e-SeriesTM GTOTM IntelliMAXTM ISOPLANARTM MegaBuckTM MICROCOUPLERTM MicroFETTM MicroPakTM MillerDriveTM MotionMaxTM Motion-SPMTM OPTOLOGIC(R) OPTOPLANAR(R)
(R)
tm
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(R)
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tm
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Rev. I35
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