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FPF2116 IntelliMAXTM Advanced Load Management Products
August 2008
FPF2116 IntelliMAXTM Advanced Load Management Products
Features
1.8 to 5.5V Input Voltage Range Controlled Turn-On 200mA Current Limit Undervoltage Lockout Thermal Shutdown <2A Shutdown Current Auto Restart Fast Current limit Response Time 3s to Moderate Over Currents 20ns to Hard Shorts Fault Blanking Reverse Current Blocking RoHS Compliant
tm
General Description
The FPF2116 is a load switch which provides full protection to systems and loads which may encounter large current conditions. This device contains a 0.125 current-limited Pchannel MOSFET which can operate over an input voltage range of 1.8-5.5V. Internally, current is prevented from flowing when the MOSFET is off and the output voltage is higher than the input voltage. Switch control is by a logic input (ON) capable of interfacing directly with low voltage control signals. The 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. If the constant current condition still persists after 30ms, the part will shut off the switch and pull the fault signal pin (FLAGB) low. An auto-restart feature will turn the switch on again after 480ms if the ON pin is still active. The minimum current limit is 200mA. The part is available in a space-saving 5 pin SOT23 package.
Applications
PDAs Cell Phones GPS Devices MP3 Players Digital Cameras Peripheral Ports Hot Swap Supplies
Typical Application Circuit
TO LOAD VIN VOUT
FPF2116
OFF ON ON GND FLAGB
Ordering Information
Part
FPF2116
Current Limit [mA]
200
Current Limit Blanking Time [ms]
30
Auto-Restart Time [ms]
480
ON Pin Activity
Active HI
Top Mark
2116
(c)2008 Fairchild Semiconductor Corporation
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FPF2116 Rev. D
FPF2116 IntelliMAXTM Advanced Load Management Products
Functional Block Diagram
VIN
UVLO
ON
CONTROL LOGIC
REVERSE CURRENT BLOCKING
CURRENT LIMIT THERMAL SHUTDOWN VOUT FLAGB
GND
Pin Configuration
VIN 1 GND ON 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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FPF2116 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 VIN Shutdown Current VOUT Shutdown Current On-Resistance
Symbol
VIN IQ IOUT = 0mA
Conditions
Min
1.8
Typ Max Units
5.5 95 110 200 2 2 125 150 160 200 200 V 0.5 1.0 1 1 0.1 0.15 0.2 0.3 1 V A A V A mA C 1.7 V mV m V A A A
VIN = 1.8 to 3.3V VIN = 3.3 to 5.5V
VON = 0V, VIN = 5.5V, VOUT short to GND VON = 0V, VOUT = 5.5V, VIN short to GND VIN = 3.3V, IOUT = 50mA, TA = 25C RON VIN = 3.3V, IOUT = 50mA, TA = 85C VIN = 3.3V, IOUT = 50mA, TA = -40C to +85C 65 0.75 1.30 VIN = 1.8V VIN = 5.5V VIN = 1.8V VIN = 5.5V VON = VIN or GND ISWOFF VON = 0V, VOUT = 0V VIN = 5V, ISINK = 10mA VIN = 1.8V, ISINK = 10mA VIN = 5V, Switch on ILIM VIN = 3.3V, VOUT = 3.0V Shutdown Threshold Return from Shutdown Hysteresis UVLO VIN Increasing 1.5 200 300 140 130 10 1.6 50
ON Input Logic High Voltage (ON) ON Input Logic Low Voltage ON Input Leakage Off Switch Leakage FLAGB Output Logic Low Voltage FLAGB Output High Leakage Current Protections Current Limit Thermal Shutdown Under Voltage Shutdown Under Voltage Shutdown Hysteresis
VIH VIL
400
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FPF2116 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
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
tON tOFF tRISE tFALL tBLANK tRESTART
Conditions
RL = 500, CL = 0.1F RL = 500, CL = 0.1F RL = 500, CL = 0.1F RL = 500, CL = 0.1F
Min
Typ Max Units
25 50 12 120 s s s s 60 960 ms ms s ns
15 240 VIN = VON = 3.3V. Moderate Over-Current Condition. VIN = VON = 3.3V. Hard Short.
30 480 3 20
Note 1: Package power dissipation on 1square inch pad, 2 oz copper board.
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Typical Characteristics
120 VON = VIN 110 SUPPLY CURRENT (uA)
130
SUPPLY CURRENT (uA)
110
VIN = 5.5V VIN = 3.3V
100 90 80 70 60 1.5
90
70
VIN = 1.8V
2
2.5
3
3.5
4
4.5
5
5.5
6
50 -40
-15
10
35
o
60
85
SUPPLY VOLTAGE (V)
TJ, JUNCTION TEMPERATURE ( C)
Figure 1. Quiescent Current vs. Input Voltage
Figure 2. Quiescent Current vs. Temperature
2500
500
SUPPLY CURRENT (nA)
VIN = 5.5V
SUPPLY CURRENT (nA)
2000
400
1500
300
VIN = 5.5V
1000 VIN = 3.3V
200
VIN = 3.3V
500
100
0 -40
-15
10
35
o
60
85
0 -40
-15
10
35
60
85
TJ, JUNCTION TEMPERATURE ( C)
TJ, JUNCTION TEMPERATURE (oC)
Figure 3. ISHUTDOWN Current vs. Temperature
Figure 4. ISWITCH-OFF Current vs. Temperature
0.20 0.18 SUPPLY CURRENT (uA)
SUPPLY CURRENT (uA)
1.4 1.2 1 0.8 0.6 0.4
VIN = 3.3V VIN = 5.5V
0.16 0.14 0.12 0.10 0.08 0.06 0.04 0.02 0.00 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 SUPPLY VOLTAGE (V)
0.2 0 -40
-15
10
35
60
85
TJ, JUNCTION TEMPERATURE (oC)
Figure 5. Reverse Current vs. Output Voltage
Figure 6. Reverse Current vs. Temperature
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Typical Characteristics
500
500
OUTPUT CURRENT (mA)
OUTPUT CURRENT (mA)
400
400
300
300
200
200
100 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3 VIN-VOUT (V)
100 -40
-15
10
35
60
85
TJ, JUNCTION TEMPERATURE (oC)
Figure 7. Current Limit vs. Output Voltage
Figure 8. Current Limit vs. Temperature
200 180 160 RON (mOhms) 140
VIN = 3.3V
1.4 1.2 ON THRESHOLD (V)
85
VIN = 1.8V
1 0.8 0.6 0.4 0.2 0
120
VIN = 5.5V
100 80 60 -40
-15
10
35
60
1.5
2
2.5
3
3.5
4
4.5
5
5.5
TJ, JUNCTION TEMPERATURE (oC)
VIN, INPUT VOLTAGE (V)
Figure 9. RON vs. Temperature
Figure 10. On Threshold vs. VIN
100
ILOAD = 10mA VCC = 3.3V
1000
ILOAD = 10mA VCC = 3.3V T(FALL)
TURN ON/OFF TIME (us)
RISE / FALL TIME (us)
TOFF
100
T(RISE)
TON
10
10 -40
-15
10
35
o
60
85
1 -40
-15
10
35
60
85
Figure 11. TON/TOFF vs. Temperature
TJ, JUNCTION TEMPERATURE ( C)
TJ, JUNCTION TEMPERATURE (oC)
Figure 12. TRISE/TFALL vs. Temperature
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Typical Characteristics
40 600
FLAG-BLANKING TIME (ms)
30
RESTART TIME (ms) -15 10 35 60 85
35
550
500
25
450
20 -40
400 -40
-15
10
35
60
85
TJ, JUNCTION TEMPERATURE (oC)
TJ, JUNCTION TEMPERATURE (oC)
Figure 13. TBLANK vs. Temperature
Figure 14. TRESTART vs. Temperature
VON 2V/DIV VOUT 2V/DIV IOUT 200mA/DIV VFLAGB 2V/DIV 10ms/DIV Figure 15. TBLANK Response
VON 2V/DIV VOUT 2V/DIV IOUT 200mA/DIV VFLAGB 2V/DIV 100ms/DIV Figure 16. TRESTART Response
RL = 500, CL = 0.1F VON 2V/DIV VON 2V/DIV
RL = 500, CL = 0.1F
IOUT 10mA/DIV
IOUT 10mA/DIV
100s/DIV Figure 17. TON Response
200ns/DIV Figure 18. TOFF Response
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Typical Characteristics
VIN 2V / DIV CIN = 10F COUT = 0.1F VIN/VON 2V/DIV IOUT 5A/DIV VOUT 2V/DIV IOUT 200mA/DIV VIN = VON
20s/DIV Figure 19. Short Circuit Response Time (Output Shorted to GND)
50s/DIV Figure 20. Current Limit Response (Switch power up to hard short)
VIN 2V/DIV
VON 2V/DIV
IOUT 200mA/DIV
50s/DIV Figure 21. Current Limit Response Time (Output Shorted to GND by 10, moderate short)
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FPF2116 IntelliMAXTM Advanced Load Management Products
Description of Operation
The FPF2116 is a current limited switch that protects systems and loads which can be damaged or disrupted by the application of high currents. The core of the 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, undervoltage lockout and thermal shutdown. The current limit is preset for 200mA.
Current Limiting
The current limit ensures that the current through the switch doesn't exceed 400mA while not limiting at less than 200mA. The part has a blanking time of 30 ms, 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.
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.
On/Off Control
The ON pin controls the state of the switch. Activating ON continuously holds the switch in the on state so long as there is no fault. An under-voltage on VIN or a junction temperature in excess of 150C overrides the ON control to turn off the switch. In addition, excessive current will cause the switch to turn off. The part has an Auto-Restart feature which will automatically turn the switch on again after 480 ms. ON is active HI and has a low threshold making it capable of interfacing with low voltage signals. When the MOSFET is off, the body diode is disabled so no current can flow through it.
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 temperature of the die drops below the threshold temperature.
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 immediately activating LO. The FLAGB goes LO at the end of the blanking time. It will remain LO during the fault 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.
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FPF2116 IntelliMAXTM Advanced Load Management Products
Application Information
Typical Application
VIN
VOUT
FPF2116
Battery 5.5V OFF ON C1 = 4.7F 5.5V MAX ON GND FLAGB
R1 = 100K R2 = 110 C2 = 0.1F
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.
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.
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. 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,
I LIM ( min ) x t BLANK ( min ) C OUT ( max ) = ----------------------------------------------------------------V IN
(1)
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 be,
P = ( I LIM ) x R DS = ( 0.4 ) x 0.125 = 20mW
2
2
(2)
When in current limit the maximum power dissipation will occur when the output is shorted to ground. 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,
t BLANK P ( max ) = ------------------------------------------- x V IN ( max ) x I LIM ( max ) t RETRY + t BLANK 60 = ---------------------- x 5.5 x 0.4 = 130mW 60 + 960
(3)
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Dimensional Outline and Pad Layout
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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
Fairchild(R) Fairchild Semiconductor(R) FACT Quiet SeriesTM FACT(R) FAST(R) FastvCoreTM FlashWriter(R) *
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
PDP SPMTM Power-SPMTM PowerTrench(R) Programmable Active DroopTM QFET(R) QSTM Quiet SeriesTM RapidConfigureTM Saving our world, 1mW at a timeTM SmartMaxTM SMART STARTTM SPM(R) STEALTHTM SuperFETTM SuperSOTTM-3 SuperSOTTM-6 SuperSOTTM-8 SupreMOSTM SyncFETTM
(R)
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tm
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ANTI-COUNTERFEITING POLICY Fairchild Semiconductor Corporation's Anti-Counterfeiting Policy. Farichild's Anti-Counterfeiting Policy is also stated on our external website, www.fairchildsemi.com, under Sales Support. Counterfeiting of semiconductor parts is a growing problem in the industry. All manufactures of semiconductor products are experiencing counterfeiting of their parts. Customers who inadvertently purchase counterfeit parts experience many problems such as loss of brand reputation, substandard performance, failed application, and increased cost of production and manufacturing delays. Fairchild is taking strong measures to protect ourselves and our customers from the proliferation of counterfeit parts. Farichild strongly encourages customers to purchase Farichild parts either directly from Fairchild or from Authorized Fairchild Distributors who are listed by country on our web page cited above. Products customers buy either from fairchild directly or from Authorized Fairchild Distributors are genuine parts, have full traceability, meet Fairchild's quality standards for handing and storage and provide access to Farichild's full range of up-to-date technical and product information. Fairchild and our Authorized Distributors will stand behind all warranties and will appropriately address and warranty issues that may arise. Fairchild will not provide any warranty coverage or other assistance for parts bought from Unauthorized Sources. Farichild is committed to committed to combat this global problem and encourage our customers to do their part in stopping this practice by buying direct or from authorized distributors. PRODUCT STATUS DEFINITIONS Definition of Terms Datasheet Identification Advance Information Preliminary No Identification Needed Obsolete Product Status Formative / In Design First Production Full Production Not In Production Definition Datasheet contains the design specifications for product development. Specifications may change in any manner without notice. Datasheet contains preliminary data; supplementary data will be published at a later date. Fairchild Semiconductor reserves the right to make changes at any time without notice to improve design. Datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice to improve the design. Datasheet contains specifications on a product that is discontinued by Fairchild Semiconductor. The datasheet is for reference information only.
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