May 2005
FPF2108-FPF2110 IntelliMAX™ Advanced Load Management Products
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 Respon Time 3us to Moderate Over Currents 20ns to Hard Shorts Rever Current Blocking Fault Blanking
Applications
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s
General Description
The FPF2108-FPF2110 is a ries 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, rever 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 caus 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 co
nstant-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.The parts are available in a space-saving 5 pin SOT23package.
Typical Application Circuit
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OFF ON
ON
V IN
GND
FPF2108 - FPF2110
FLAGB
V OUT
TO LOAD
FPF2108-FPF2110 IntelliMAX™ Advanced Load Management Products
Functional Block Diagram
Pin Configuration
鲸鱼多重Pin Description
Pin
Name
Function
1V IN Supply Input: Input to the power switch and the supply voltage for the IC
新四世同堂2GND Ground
3ON ON Control Input
4FLAGB Fault Output: Active LO, open drain output which indicates an over current supply,under voltage or over temperature state.5
V OUT
Switch Output: Output of the power switch
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THERMAL SHUTDOWN
CURRENT LIMIT
CONTROL LOGIC
V IN
ON
V OUT FLAGB
GND
REVERSE CURRENT BLOCKING
什么不经心
V IN GND ON
FLAGB V OUT
SOT23-5
123
4
5
FPF2108-FPF2110 IntelliMAX™ Advanced Load Management Products
Absolute Maximum Ratings
Recommended Operating Range
Electrical Characteristics
V IN = 1.8 to 5.5V, T A = -40 to +85°C unless otherwi noted. Typical values are at V IN = 3.3V and T A = 25°C.
Parameter
Min.
Max.
Unit
V IN , V OUT , ON, FLAGB to GND
-0.3
6V Power Dissipation @ T A = 25°C (note 1)667mW Operating Temperature Range -40125°C Storage Temperature
-65
150°C Thermal Resistance, Junction to Ambient 150
°C/W Electrostatic Discharge Protection
HBM 4000V MM
400V
Parameter
Min.
Max.
Unit
V IN
1.8 5.5V Ambient Operating Temperature, T A
-40
85
°C
Parameter
Symbol
Conditions Min.
Typ.Max
Units
Basic Operation Operating Voltage V IN 1.8
5.5
V Quiescent Current I Q I OUT = 0mA V IN = 1.8 to 3.3V 95 A
Von active
V IN = 3.3 to 5.5V
110
200Shutdown Current
I SHDN 2 A Rever Block Leakage Current I BLOCK 1
A Latch-Off Current (note 2)I LATCHOFF V ON = V IN , after an overcurrent fault 50 A On-Resistance
军事文学R ON T A = 25°C, I OUT = 50mA 125160
m T A = -40 to +85°C, I OUT = 50mA 150
ON Input Logic High Voltage V IH V IN = 1.8V 0.75V
V IN = 5.5V 1.30
ON Input Logic Low Voltage V IL
V IN = 1.8V 0.5V V IN = 5.5V 1.0ON Input Leakage V ON = V IN or GND
1 A Off Switch Leakage
I SWOFF V ON = 0V, V OUT = 0V 1
A FLAG
B Output Logic Low Voltage V IN = 5V, I SINK = 10mA 0.10.2V V IN = 1.8V, I SINK = 10mA 0.15
0.3FLAGB Output High Leakage Current V IN = 5V, Switch on
1
A Protections Current Limit
I LIM
V IN = 3.3V, V OUT = 3.0V
FPF2109200300400mA
FPF2108,
FPF2110
400
600800
继续加油
Thermal Shutdown Shutdown Threshold 140°C
Return from Shutdown 130Hysteresis
10
Under Voltage Shutdown
UVLO
V IN Increasing
1.5
1.6 1.7V Under Voltage Shutdown Hysteresis
47
mV
