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FPF2108-FPF2110 IntelliMAX™ Advanced Load Management Products
August 2008
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
<2µA Shutdown Current
Fast Current limit Response Time
3µs to Moderate Over Currents
20ns to Hard Shorts
Reverse Current Blocking
Fault Blanking
RoHS Compliant
tm
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
V
IN
V
OUT
FPF2108 - FPF2110
OFF ON
ON
GND
FLAGB
Ordering Information
Part
FPF2108
FPF2109
FPF2110
Current Limit
[mA]
400
200
400
Current Limit
Blanking Time
[ms]
10
0
0
Auto-Restart
Time
[ms]
NA
NA
NA
ON Pin
Activity
Active LO
Active HI
Active HI
Top Mark
2108
2109
2110
©2008 Fairchild Semiconductor Corporation
1
www.fairchildsemi.com
FPF2108-FPF2110 Rev. E
FPF2108-FPF2110 IntelliMAX™ Advanced Load Management Products
Functional Block Diagram
V
IN
UVLO
ON
CONTROL
LOGIC
REVERSE
CURRENT
BLOCKING
CURRENT
LIMIT
THERMAL
SHUTDOWN
V
OUT
FLAGB
GND
Pin Configuration
V
IN
1
GND
ON
2
3
SOT23-5
4
FLAGB
5
V
OUT
Pin Description
Pin
1
2
3
4
5
Name
V
IN
GND
ON
FLAGB
V
OUT
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. E
2
www.fairchildsemi.com
FPF2108-FPF2110 IntelliMAX™ Advanced Load Management Products
Absolute Maximum Ratings
Parameter
V
IN
, V
OUT
, ON, FLAGB to GND
Power Dissipation @ T
A
= 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
V
IN
Ambient Operating Temperature, T
A
Min
1.8
-40
Max
5.5
85
Unit
V
°C
Electrical Characteristics
V
IN
= 1.8 to 5.5V, T
A
= -40 to +85°C unless otherwise noted. Typical values are at V
IN
= 3.3V and T
A
= 25°C.
Parameter
Basic Operation
Operating Voltage
Quiescent Current
Shutdown Current
Reverse Block Leakage Current
Latch-Off Current (note 2)
On-Resistance
Symbol
V
IN
I
Q
I
SHDN
I
BLOCK
I
LATCHOFF
R
ON
I
OUT
= 0mA
Von active
Conditions
Min
1.8
Typ Max Units
5.5
95
110
200
2
1
V
µA
µA
µA
µA
160
200
200
V
0.5
1.0
1
1
0.1
0.15
0.2
0.3
1
V
µA
µA
V
µA
mΩ
V
IN
= 1.8 to 3.3V
V
IN
= 3.3 to 5.5V
V
ON
= V
IN
, after an overcurrent fault
V
IN
= 3.3V, I
OUT
= 50mA, T
A
= 25°C
V
IN
= 3.3V, I
OUT
= 50mA, T
A
= 85°C
V
IN
= 3.3V, I
OUT
= 50mA, T
A
= -40°C to +85°C
65
0.75
1.30
V
IN
= 1.8V
V
IN
= 5.5V
V
IN
= 1.8V
V
IN
= 5.5V
V
ON
= V
IN
or GND
V
ON
= 0V, V
OUT
= 0V
V
IN
= 5V, I
SINK
= 10mA
V
IN
= 1.8V, I
SINK
= 10mA
V
IN
= 5V, Switch on
V
IN
= 3.3V,
V
OUT
= 3.0V
Shutdown Threshold
Return from Shutdown
Hysteresis
FPF2109
FPF2108, FPF2110
200
400
50
125
150
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
V
IH
V
IL
I
SWOFF
I
LIM
300
600
140
130
10
400
800
mA
Thermal Shutdown
Under Voltage Shutdown
Under Voltage Shutdown Hysteresis
UVLO
°C
1.7
V
mV
V
IN
Increasing
1.5
1.6
47
FPF2108-FPF2110 Rev. E
3
www.fairchildsemi.com
FPF2108-FPF2110 IntelliMAX™ Advanced Load Management Products
Electrical Characteristics Cont.
V
IN
= 1.8 to 5.5V, T
A
= -40 to +85°C unless otherwise noted. Typical values are at V
IN
= 3.3V and T
A
= 25°C
.
Parameter
Dynamic
Turn on time
Turn off time
V
OUT
Rise Time
V
OUT
Fall Time
Over Current Blanking Time
Short Circuit Response Time
Symbol
t
ON
t
OFF
t
R
t
F
t
BLANK
Conditions
R
L
= 500Ω, C
L
= 0.1µF
R
L
= 500Ω, C
L
= 0.1µF
R
L
= 500Ω, C
L
= 0.1µF
R
L
= 500Ω, C
L
= 0.1µF
FPF2108
V
IN
= V
ON
= 3.3V. Moderate
Over-Current Condition.
V
IN
= V
ON
= 3.3V. Hard Short.
Min. Typ. Max Units
25
50
12
136
5
10
3
20
20
µs
µs
µs
µs
ms
µs
ns
Note 1:
Package power dissipation on 1square inch pad, 2 oz copper board.
Note 2:
Applicable only to FPF2108. Latchoff current does not include current flowing into FLAGB.
FPF2108-FPF2110 Rev. E
4
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