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FPF2108-FPF2110 IntelliMAX™ Advanced Load Management Products
May 2005
FPF2108-FPF2110 IntelliMAX™ 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 <2uA Shutdown Current Fast Current limit Response Time 3us to Moderate Over Currents 20ns to Hard Shorts Reverse Current Blocking Fault Blanking
General Description
The FPF2108-FPF2110 is a series of load switches which provides full protection to systems and loads which may encounter large current conditions. This devices contain a 0.125Ω current-limited P-channel MOSFET which can operate over an input voltage range of 1.8-5.5V. Internally, reverse current blocking prevents current 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. 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 FPF2108, if the constant current condition still persists after 10ms, the part will shut off the switch and pull the fault signal pin (FLAGB) low. The switch will remain off until the ON pin is cycled. For the FPF2109 and FPF2110, 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. The minimum current limit is 200mA for the FPF2109 while that for the FPF2108 and FPF2110 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
Typical Application Circuit
TO LOAD VIN VOUT
FPF2108 - FPF2110
OFF ON ON GND FLAGB
©2005 Fairchild Semiconductor Corporation
FPF2108-FPF2110 Rev. B
1
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FPF2108-FPF2110 IntelliMAX™ 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
FPF2108-FPF2110 Rev. B
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FPF2108-FPF2110 IntelliMAX™ Advanced Load Management Products
Absolute Maximum Ratings
Parameter
VIN, VOUT, ON, FLAGB to GND Power Dissipation @ TA = 25°C (note 1) Operating Temperature Range 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 +85°C unless otherwise noted. Typical values are at VIN = 3.3V and TA = 25°C.
Parameter
Basic Operation Operating Voltage Quiescent Current Shutdown Current Reverse Block Leakage Current Latch-Off Current (note 2) On-Resistance ON Input Logic High Voltage ON Input Logic Low Voltage ON Input Leakage Off Switch Leakage FLAGB Output Logic Low Voltage FLAGB Output High Leakage Current Protections Current Limit
Symbol
VIN IQ ISHDN IBLOCK ILATCHOFF RON VIH VIL
Conditions
Min.
1.8
Typ.
Max
5.5
Units
V A
IOUT = 0mA Von active
VIN = 1.8 to 3.3V VIN = 3.3 to 5.5V
95 110 200 2 1
A A A m V
VON = VIN, after an overcurrent fault TA = 25°C, IOUT = 50mA TA = -40 to +85°C, IOUT = 50mA VIN = 1.8V VIN = 5.5V VIN = 1.8V VIN = 5.5V VON = VIN or GND 0.75 1.30
50 125 150 160
0.5 1.0 1 1 0.1 0.15 0.2 0.3 1 FPF2109 FPF2108, FPF2110 200 400 300 600 140 130 10 1.5 1.6 47 1.7 400 800
V A A V A mA
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
Thermal Shutdown
Shutdown Threshold Return from Shutdown Hysteresis
°C
Under Voltage Shutdown Under Voltage Shutdown Hysteresis
UVLO
VIN Increasing
V mV
FPF2108-FPF2110 Rev. B
3
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FPF2108-FPF2110 IntelliMAX™ Advanced Load Management Products
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
Dynamic Turn on time Turn off time VOUT Rise Time VOUT Fall Time Over Current Blanking Time Short Circuit Response Time
Symbol
tON tOFF tR tF tBLANK
Conditions
RL=500 , CL=0.1uF RL=500 , CL=0.