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November 2008
FPF2140/42/43/44/46/47
Full Function Load Switch with Reverse Current Blockingtm
Features
„ 1.8 to 5.5V Input Voltage Range
„ Controlled Turn-On
„ 200mA and 400mA Current Limit Options
„ Undervoltage Lockout
„ Thermal Shutdown
„ <2µA Shutdown Current
„ Auto Restart
„ Fast Current limit Response Time
„ 5µs to Moderate Over Currents
„ 30ns to Hard Shorts
„ Fault Blanking
„ Reverse Current Blocking
„ Power Good Function
„ RoHS Compliant
Applications
„ PDAs
„ Cell Phones
„ GPS Devices
„ MP3 Players
„ Digital Cameras
„ Peripheral Ports
„ Hot Swap Supplies
General Description
The FPF2140/42/43/44/46/47 is a series of load switches which
provides full protection to systems and loads which may
encounter large current conditions. These devices contain a
0.12current-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. 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 FPF2140/42/44/46, if
the constant current condition still persists after 30ms, the part
will shut off the switch and pull the fault signal pin (FLAGB) low.
The FPF2140/44 have an auto-restart feature which will turn the
switch on again after 450ms if the ON pin is still active. The
FPF2142/46 do not have this auto-restart feature so the switch
will remain off until the ON pin is cycled. For the FPF2143/47, 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 FPF2140/42/43 while that for the
FPF2144/46/47 is 400mA.
These parts are available in a space-saving 6 pin 2X2 MLP
package.
BOTTOM
Ordering Information
Part
FPF2140
FPF2142
FPF2143
FPF2144
FPF2146
FPF2147
Current Limit
[mA]
200/300/400
200/300/400
200/300/400
400/600/800
400/600/800
400/600/800
Pin 1
Current Limit
Blanking Time
[ms]
15/30/60
15/30/60
0
15/30/60
15/30/60
0
TOP
Auto-Restart
Time
[ms]
225/450/900
NA
NA
225/450/900
NA
NA
©2008 Fairchild Semiconductor Corporation
FPF2140/42/43/44/46/47 Rev. I
1
ON Pin
Activity
Active HI
Active HI
Active HI
Active HI
Active HI
Active HI
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Typical Application Circuit
OFF ON
VIN VOUT
FPF2140/2/3/4/6/7
PGOOD
FLAGB
ON
GND
TO LOAD
Functional Block Diagram
VIN
UVLO
ON
THERMAL
SHUTDOWN
CONTROL
LOGIC
FLAGB
CURRENT
LIMIT
REVERSE
CURRENT
BLOCKING
VOUT
PGOOD
GND
FPF2140/42/43/44/46/47 Rev. I
2
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Pin Configuration
ON 6
1 PGOOD
GND 5 7 2 VIN
FLAGB 4
3 VOUT
2X2 MicroFET-6
Pin Description
Pin Name
1 PGOOD
2 VIN
3 VOUT
4 FLAGB
5, 7 GND
6 ON
Function
Power Good output: Open drain output which indicate that output voltage has reached
90% of input voltage
Supply Input: Input to the power switch and the supply voltage For the IC
Switch Output: Output of the power switch
Fault Output: Active LO, open drain output which indicates an over current supply under
voltage or over temperature state.
Ground
ON Control Input
Absolute Maximum Ratings
Parameter
VIN, VOUT, ON, FLAGB, PGOOD to GND
Power Dissipation
Operating and Storage Junction Temperature
Thermal Resistance, Junction to Ambient
Electrostatic Discharge Protection
Jedec A114A
Jedec C101C
Jedec A115
IEC 61000-4-2
HBM
CDM
MM
Air Discharge
Contact Discharge
Min
-0.3
-65
4000
2000
400
15000
8000
Max
6
1.2
150
86
Unit
V
W
°C
°C/W
V
V
V
V
V
Recommended Operating Range
Parameter
VIN
Ambient Operating Temperature, TA
Min
Max
Unit
1.8 5.5
V
-40 85 °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
Symbol
Conditions
Min
Basic Operation
Operating Voltage
Quiescent Current
VIN
IQ IOUT = 0mA
VIN = 1.8V
VIN = 3.3V
VIN = 5.5V
1.8
40
Typ
70
75
85
Max Units
5.5 V
100
µA
120
FPF2140/42/43/44/46/47 Rev. I
3
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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
On-Resistance
ON Input Logic High Voltage
(ON)
ON Input Logic Low Voltage
ON Input Leakage
VIN Shutdown Current
FLAGB Output Logic Low
Voltage
FLAGB Output High Leakage
Current
RON
VIH
VIL
VIN = 3.3V, IOUT = 200mA, TA = 25°C
VIN = 3.3V, IOUT = 200mA, TA = 85°C
VIN = 3.3V, IOUT = 200mA, TA = -40°C to +85°C
VIN = 1.8V
VIN = 5.5V
VIN = 1.8V
VIN = 5.5V
VON = VIN or GND
VON = 0V, VIN = 5.5V,
VOUT = short to GND
VIN = 5V, ISINK = 10mA
VIN = 1.8V, ISINK = 10mA
VIN = VON = 5V
65
0.8
1.4
-1
-2
120
135
0.05
0.12
PGOOD Threshold Voltage
PGOOD Threshold Voltage
Hysteresis
VIN = 5.5V
90
1
PGOOD Output Logic Low
Voltage
PGOOD Output High Leakage
Current
VIN = 5V, ISINK = 10mA
VIN = 1.8V, ISINK = 10mA
VIN = VON = 5V
0.05
0.12
Reverse Block
VOUT Shutdown Current
Protections
VON = 0V, VOUT = 5.5V,
VIN = short to GND
-2
Current Limit
FPF2140, FPF2142,
ILIM
VIN = 3.3V,
VOUT = 3.0V
FPF2143
FPF2144, FPF2146,
FPF2147
200 300
400 600
Thermal Shutdown
Shutdown Threshold TJ increasing
Return from Shutdown
140
130
Hysteresis
10
Under Voltage Lockout
Under Voltage Lockout
Hysteresis
VUVLO VIN Increasing
1.55 1.65
50
Dynamic
Delay On Time
tdON
RL = 500, CL = 0.1µF
Delay Off Time
tdOFF RL = 500, CL = 0.1µF
VOUT Rise Time
tR RL = 500, CL = 0.1µF
VOUT Fall Time
tF RL = 500, CL = 0.1µF
Over Current Blanking Time
tBLANK FPF2140, FPF2142, FPF2144, FPF2146
Auto-Restart Time
tRSTRT FPF2140, FPF2144
Short Circuit Response Time
VIN = VON = 3.3V. Moderate
Over-Current Condition
VIN = VON = 3.3V. Hard Short
Note 1: Package power dissipation on 1 square inch pad, 2 oz. copper board.
25
45
10
110
15 30
225 450
5
30
Max Units
160
180 m
180
V
0.5
V
1
1 µA
2 µA
0.2
V
0.3
1 µA
%
%
0.1 V
0.2 V
1 µA
2 µA
400
mA
800
°C
1.75 V
mV
µs
µs
µs
µs
60 ms
900 ms
µs
ns
FPF2140/42/43/44/46/47 Rev. I
4
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Typical Characteristics
90
85
80
75
70
65
60
1 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
110
105
100
95
90
85
80
75
70
65
60
55
50
-40
VIN = 5.5V
VIN = 3.3V
VIN = 1.8V
-15 10 35 60
TJ, JUNCTION TEMPERATURE (°C)
85
Figure 2. Quiescent Current vs. Temperature
1.3
1.2
1.1
1
0.9
0.8
0.7
0.6
1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
SUPPLY VOLTAGE (V)
Figure 3. VON High Voltage vs. Input Voltage
1.2
1.1
1
0.9
0.8
0.7
0.6
0.5
1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
SUPPLY VOLTAGE (V)
Figure 4. VON Low Voltage vs. Input Voltage
200
190
180
170
160
150
140
130
120
110
100
90
80
1
234
VIN, SUPPLY VOLTAGE (V)
Figure 5. RON vs. VIN
5
240
220
200
180
160
140
120
100
80
60
6 -40
VIN= 1.8V
VIN= 3.3V
VIN= 5.5V
-15 10 35 60
TJ, JUNCTION TEMPERATURE (°C)
Figure 6. RON vs. Temperature
85
FPF2140/42/43/44/46/47 Rev. I
5
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