FPF2116 [ONSEMI]

IntelliMAX™ 高级负载管理产品;
FPF2116
型号: FPF2116
厂家: ONSEMI    ONSEMI
描述:

IntelliMAX™ 高级负载管理产品

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August 2008  
FPF2116  
IntelliMAX™ Advanced Load Management Products  
tm  
Features  
General Description  
„ 1.8 to 5.5V Input Voltage Range  
„ Controlled Turn-On  
The FPF2116 is a load switch which provides full protection to  
systems and loads which may encounter large current  
conditions. This device contains a 0.125current-limited P-  
channel 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.  
„ 200mA Current Limit  
„ Undervoltage Lockout  
„ Thermal Shutdown  
„ <2µA Shutdown Current  
„ Auto Restart  
„ Fast Current limit Response Time  
„ 3µs 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. 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.  
„ Fault Blanking  
„ Reverse Current Blocking  
„ RoHS Compliant  
Applications  
„ PDAs  
The part is available in a space-saving 5 pin SOT23 package.  
„ Cell Phones  
„ GPS Devices  
„ MP3 Players  
„ Digital Cameras  
„ Peripheral Ports  
„ Hot Swap Supplies  
Typical Application Circuit  
TO LOAD  
VOUT  
VIN  
ON  
FPF2116  
OFF ON  
FLAGB  
GND  
Ordering Information  
Current Limit  
Blanking Time  
[ms]  
Auto-Restart  
Time  
Current Limit  
ON Pin  
Activity  
Part  
[mA]  
[ms]  
Top Mark  
FPF2116  
200  
30  
480  
Active HI  
2116  
©2008 Fairchild Semiconductor Corporation  
FPF2116 Rev. D  
1
www.fairchildsemi.com  
Functional Block Diagram  
VIN  
UVLO  
REVERSE  
CURRENT  
BLOCKING  
CONTROL  
LOGIC  
ON  
CURRENT  
LIMIT  
VOUT  
THERMAL  
SHUTDOWN  
FLAGB  
GND  
Pin Configuration  
VIN  
1
5
4
VOUT  
GND  
ON  
2
3
FLAGB  
SOT23-5  
Pin Description  
Pin  
Name  
VIN  
Function  
1
2
3
Supply Input: Input to the power switch and the supply voltage for the IC  
GND  
ON  
Ground  
ON Control Input  
Fault Output: Active LO, open drain output which indicates an over current supply,  
under voltage or over temperature state.  
4
5
FLAGB  
VOUT  
Switch Output: Output of the power switch  
2
www.fairchildsemi.com  
FPF2116 Rev. D  
Absolute Maximum Ratings  
Parameter  
Min  
Max  
6
Unit  
V
VIN, VOUT, ON, FLAGB to GND  
Power Dissipation @ TA = 25°C (note 1)  
Operating Junction Temperature  
Storage Temperature  
-0.3  
667  
125  
150  
150  
mW  
°C  
-40  
-65  
°C  
Thermal Resistance, Junction to Ambient  
°C/W  
V
HBM  
MM  
4000  
400  
Electrostatic Discharge Protection  
V
Recommended Operating Range  
Parameter  
Min  
1.8  
Max  
5.5  
Unit  
V
VIN  
Ambient Operating Temperature, TA  
-40  
85  
°C  
Electrical Characteristics  
VIN =1.8to5.5V,TA =-40to+85°Cunlessotherwisenoted.TypicalvaluesareatVIN =3.3VandTA = 25°C.  
Parameter  
Symbol  
Conditions  
Min Typ Max Units  
Basic Operation  
Operating Voltage  
VIN  
IQ  
1.8  
5.5  
V
VIN = 1.8 to 3.3V  
VIN = 3.3 to 5.5V  
95  
Quiescent Current  
IOUT = 0mA  
µA  
110  
200  
2
VIN Shutdown Current  
VOUT Shutdown Current  
VON = 0V, VIN = 5.5V, VOUT short to GND  
VON = 0V, VOUT = 5.5V, VIN short to GND  
VIN = 3.3V, IOUT = 50mA, TA = 25°C  
VIN = 3.3V, IOUT = 50mA, TA = 85°C  
VIN = 3.3V, IOUT = 50mA, TA = -40°C to +85°C  
VIN = 1.8V  
µA  
µA  
2
125  
150  
160  
200  
200  
On-Resistance  
RON  
mΩ  
65  
0.75  
1.30  
ON Input Logic High Voltage (ON)  
ON Input Logic Low Voltage  
VIH  
VIL  
V
V
VIN = 5.5V  
VIN = 1.8V  
0.5  
1.0  
1
VIN = 5.5V  
ON Input Leakage  
Off Switch Leakage  
VON = VIN or GND  
µA  
µA  
ISWOFF  
VON = 0V, VOUT = 0V  
1
V
IN = 5V, ISINK = 10mA  
0.1  
0.2  
0.3  
1
FLAGB Output Logic Low Voltage  
V
VIN = 1.8V, ISINK = 10mA  
VIN = 5V, Switch on  
0.15  
FLAGB Output High Leakage Current  
Protections  
µA  
Current Limit  
ILIM  
VIN = 3.3V, VOUT = 3.0V  
Shutdown Threshold  
Return from Shutdown  
Hysteresis  
200  
1.5  
300  
140  
130  
10  
400  
mA  
°C  
Thermal Shutdown  
Under Voltage Shutdown  
UVLO  
VIN Increasing  
1.6  
50  
1.7  
V
Under Voltage Shutdown Hysteresis  
mV  
3
www.fairchildsemi.com  
FPF2116 Rev. D  
Electrical Characteristics Cont.  
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  
Dynamic  
Turn On Time  
tON  
tOFF  
RL = 500, CL = 0.1µF  
25  
50  
µs  
µs  
µs  
µs  
ms  
ms  
Turn Off Time  
RL = 500, CL = 0.1µF  
RL = 500, CL = 0.1µF  
RL = 500, CL = 0.1µF  
VOUT Rise Time  
VOUT Fall Time  
Over Current Blanking Time  
Auto-Restart Time  
tRISE  
12  
tFALL  
120  
30  
tBLANK  
tRESTART  
15  
60  
240  
480  
960  
V
IN = VON = 3.3V. Moderate  
3
µs  
ns  
Over-Current Condition.  
Short Circuit Response Time  
V
IN = VON = 3.3V. Hard Short.  
20  
Note 1: Package power dissipation on 1square inch pad, 2 oz copper board.  
4
www.fairchildsemi.com  
FPF2116 Rev. D  
Typical Characteristics  
120  
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  
10  
TJ, JUNCTION TEMPERATURE (oC)  
Figure 2. Quiescent Current vs. Temperature  
35  
60  
85  
85  
85  
1.5  
2
2.5  
3
3.5  
4
4.5  
5
5.5  
6
SUPPLY VOLTAGE (V)  
Figure 1. Quiescent Current vs. Input Voltage  
2500  
500  
400  
300  
200  
100  
0
2000  
1500  
1000  
500  
0
V
IN = 5.5V  
VIN = 5.5V  
VIN = 3.3V  
VIN = 3.3V  
-40  
-15  
10  
35  
60  
-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  
0.20  
0.18  
0.16  
0.14  
0.12  
0.10  
0.08  
0.06  
0.04  
0.02  
0.00  
1.4  
1.2  
1
VIN = 5.5V  
0.8  
0.6  
0.4  
0.2  
0
VIN = 3.3V  
-40  
-15  
10  
35  
60  
1.5  
2.0  
2.5  
3.0  
3.5  
4.0  
4.5  
5.0  
5.5  
6.0  
TJ, JUNCTION TEMPERATURE (oC)  
SUPPLY VOLTAGE (V)  
Figure 5. Reverse Current vs. Output Voltage  
Figure 6. Reverse Current vs. Temperature  
5
www.fairchildsemi.com  
FPF2116 Rev. D  
Typical Characteristics  
500  
500  
400  
300  
200  
100  
400  
300  
200  
100  
-40  
-15  
10  
TJ, JUNCTION TEMPERATURE (oC)  
Figure 8. Current Limit vs. Temperature  
35  
60  
85  
0.3  
0.6  
0.9  
1.2  
1.5  
1.8  
2.1  
2.4  
2.7  
3
85  
85  
V -VOUT (V)  
IN  
Figure 7. Current Limit vs. Output Voltage  
200  
1.4  
1.2  
1
180  
160  
140  
120  
100  
80  
VIN = 1.8V  
0.8  
0.6  
0.4  
0.2  
0
VIN = 3.3V  
V
IN = 5.5V  
60  
-40  
-15  
10  
35  
60  
1.5  
2
2.5  
3
3.5  
4
4.5  
5
5.5  
TJ, JUNCTION TEMPERATURE (oC)  
V , INPUT VOLTAGE (V)  
IN  
Figure 9. RON vs. Temperature  
Figure 10. On Threshold vs. VIN  
1000  
100  
ILOAD = 10mA  
CC = 3.3V  
ILOAD = 10mA  
VCC = 3.3V  
V
T(FALL)  
100  
10  
1
TOFF  
T(RISE)  
TON  
10  
-40  
-15  
TJ, JUNCTION TEMPERATURE (oC)  
Figure 11. TON/TOFF vs. Temperature  
10  
35  
60  
-40  
-15  
10  
35  
60  
85  
TJ, JUNCTION TEMPERATURE (oC)  
Figure 12. TRISE/TFALL vs. Temperature  
6
www.fairchildsemi.com  
FPF2116 Rev. D  
Typical Characteristics  
40  
600  
550  
500  
450  
400  
35  
30  
25  
20  
-40  
-15  
10  
35  
60  
85  
-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  
VON  
2V/DIV  
2V/DIV  
VOUT  
VOUT  
2V/DIV  
2V/DIV  
IOUT  
IOUT  
200mA/DIV  
200mA/DIV  
VFLAGB  
2V/DIV  
VFLAGB  
2V/DIV  
10ms/DIV  
100ms/DIV  
Figure 15. TBLANK Response  
Figure 16. TRESTART Response  
RL = 500, CL = 0.1µF  
RL = 500, CL = 0.1µF  
VON  
VON  
2V/DIV  
2V/DIV  
IOUT  
IOUT  
10mA/DIV  
10mA/DIV  
100µs/DIV  
200ns/DIV  
Figure 17. TON Response  
Figure 18. TOFF Response  
7
www.fairchildsemi.com  
FPF2116 Rev. D  
Typical Characteristics  
VIN = VON  
VIN  
CIN = 10µF  
2V / DIV  
COUT = 0.1µF  
V
IN/VON  
2V/DIV  
IOUT  
5A/DIV  
IOUT  
200mA/DIV  
VOUT  
2V/DIV  
20µs/DIV  
50µs/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  
50µs/DIV  
Figure 21. Current Limit Response Time  
(Output Shorted to GND by 10, moderate short)  
8
www.fairchildsemi.com  
FPF2116 Rev. D  
Current Limiting  
Description of Operation  
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.  
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 0.125Ω  
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 200mA.  
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 150°C 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 over-  
temperature 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.  
9
www.fairchildsemi.com  
FPF2116 Rev. D  
Application Information  
Typical Application  
VOUT  
VIN  
ON  
R1 = 100KΩ  
FPF2116  
R2 = 110Ω  
OFF ON  
5.5V MAX  
FLAGB  
Battery  
5.5V  
C2 = 0.1µF  
GND  
C1 = 4.7µF  
Input Capacitor  
Board Layout  
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 4.7µF 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.  
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,  
ILIM(min) × tBLANK(min)  
(1)  
COUT(max) = -----------------------------------------------------------------  
VIN  
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 = (ILIM)2 × RDS = (0.4)2 × 0.125 = 20mW  
(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,  
tBLANK  
-------------------------------------------  
P(max) =  
× VIN(max) × ILIM(max)  
t
RETRY + tBLANK  
60  
60 + 960  
----------------------  
=
× 5.5 × 0.4 = 130mW  
(3)  
10  
www.fairchildsemi.com  
FPF2116 Rev. D  
Dimensional Outline and Pad Layout  
11  
www.fairchildsemi.com  
FPF2116 Rev. D  
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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 Now™  
CorePLUS™  
CorePOWER™  
CROSSVOLT™  
CTL™  
FPS™  
F-PFS™  
FRFET  
PDP SPM™  
Power-SPM™  
PowerTrench  
The Power Franchise  
®
®
Global Power ResourceSM  
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Programmable Active Droop™  
TinyBoost™  
TinyBuck™  
®
QFET  
Current Transfer Logic™  
Green FPS™ e-Series™  
GTO™  
IntelliMAX™  
ISOPLANAR™  
MegaBuck™  
MICROCOUPLER™  
MicroFET™  
QS™  
Quiet Series™  
RapidConfigure™  
Saving our world, 1mW at a time™  
SmartMax™  
®
TinyLogic  
®
EcoSPARK  
TINYOPTO™  
TinyPower™  
TinyPWM™  
TinyWire™  
µSerDes™  
EfficentMax™  
EZSWITCH™ *  
SMART START™  
®
SPM  
MicroPak™  
MillerDrive™  
MotionMax™  
Motion-SPM™  
STEALTH™  
SuperFET™  
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SuperSOT™-8  
SupreMOS™  
®
Fairchild  
®
®
Fairchild Semiconductor  
FACT Quiet Series™  
UHC  
Ultra FRFET™  
UniFET™  
VCX™  
®
®
FACT  
OPTOLOGIC  
®
®
FAST  
OPTOPLANAR  
®
FastvCore™  
FlashWriter  
SyncFET™  
VisualMax™  
®
®
*
tm  
®
* EZSWITCH™ and FlashWriter are trademarks of System General Corporation, used under license by Fairchild Semiconductor.  
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Datasheet contains the design specifications for product development. Specifications may change  
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The datasheet is for reference information only.  
Rev. I35  
12  
www.fairchildsemi.com  
FPF2116 Rev. D  
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