FPF2500-FPF2506 IntelliMAX™ Advanced Load Management Products
February 2007
FPF2500-FPF2506
IntelliMAX™ Advanced Load Management Products
Features
4.5 to 20V Input Voltage Range
Controlled Turn-On
0.4A, 0.8A and Adjustable Current Limit Option
Undervoltage Lockout
Thermal Shutdown
<10uA Shutdown Current
Auto Restart
Fault Blanking
tm
General Description
The FPF2500 through FPF2506 is a family of load switches
which provide full protection to systems and loads which may
encounter large current conditions. These devices contain a
0.23Ω current-limited N-channel MOSFET which can operate
over an input voltage range of 4.5-20V. 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 FPF2500, FPF2501,
FPF2503 and FPF2505, if the constant current condition still
persists after 5ms, these parts will shut off the switch and, for
the FPF2503 and FPF2505, the fault signal pin (FLAGB) will be
pulled low. The FPF2500, FPF2503, and FPF2505, have an
auto-restart feature which will turn the switch on again after
640ms if the ON pin is still active. The FPF2501 does not have
this auto-restart feature so the switch will remain off until the ON
pin is cycled. For the FPF2502, FPF2504 and FPF2506, 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. For the FPF2500
through FPF2502, the minimum current limit is adjustable from
500mA to 2A. For the FPF2503 and FPF2504 the minimum
current is internally fixed at 400mA while that for the FPF2505
and FPF2506 is internally fixed at 800mA.
These parts are available in a space-saving 5 pin SOT23
package.
Applications
PDAs
Motor Drivers
Cell Phones
Digital Cameras
RoHS Compliant
Ordering Information
Current Limit
Blanking Time
[ms]
2.5/5/10
2.5/5/10
0
2.5/5/10
0
2.5/5/10
0
Part
FPF2500
FPF2501
FPF2502
FPF2503
FPF2504
FPF2505
FPF2506
Current Limit [A]
Adjustable (0.5-2.0 +/-30%)
Adjustable (0.5-2.0 +/-30%)
Adjustable (0.5-2.0 +/-30%)
0.4/0.6/0.8
0.4/0.6/0.8
0.8/1.2/1.6
0.8/1.2/1.6
Auto-Restart
Time
[ms]
320/640/1280
NA
NA
320/640/1280
NA
320/640/1280
NA
Fault Pin
No
No
No
Yes
Yes
Yes
Yes
©2007 Fairchild Semiconductor Corporation
FPF2500-FPF2506 Rev. D4
1
www.fairchildsemi.com
FPF2500-FPF2506 IntelliMAX™ Advanced Load Management Products
Pin Configuration
V
OUT
1
GND
FLAGB/ISET
2
3
SOT23-5
4
ON
5
V
IN
Pin Description
Pin
1
2
Name
V
OUT
GND
FLAGB
Ground
Function
Switch Output: Output of the power switch
Fault Output (FPF2503-FPF2506): Active LO, open drain output which indicates on over
current supply under voltage or over temperature state.
Adjustable Current Limit Setting Resistor (FPF2500-FPF2502): An external resistor
connected between this pin and ground sets the current limit value.
ON Control Input:
Supply Input: Input to the power switch and the supply voltage for the IC
3
ISET
4
5
ON
V
IN
Absolute Maximum Ratings
Parameter
V
IN
, V
OUT
, to GND
ON, FLAGB, ISET 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
2000
200
-40
-65
Min.
-0.3
-0.3
Max.
20
5.5
667
125
150
150
Unit
V
V
mW
°C
°C
°C/W
V
V
Recommended Operating Range
Parameter
V
IN
Ambient Operating Temperature, T
A
Min.
4.5
-40
Max.
20
85
Unit
V
°C
Electrical Characteristics
V
IN
= 4.5 to 20V, T
A
= -40 to +85°C unless otherwise noted. Typical values are at V
IN
= 12V and T
A
= 25°C.
Parameter
Basic Operation
Operating Voltage
Quiescent Current
Shutdown Current
Latch-Off Current
On-Resistance
Symbol
V
IN
I
Q
I
SHDN
I
LATCHOFF
R
ON
FPF2501
Conditions
Min.
4.5
Typ.
Max.
20
Unit
V
µA
µA
µA
I
OUT
= 0mA, V
IN
= 12V, Von=5V
60
45
230
300
100
1
T
A
= 25°C, I
OUT
= 50mA
T
A
= -40 to +85°C, I
OUT
= 50mA
320
mΩ
3
FPF2500-FPF2506 Rev. D4
www.fairchildsemi.com
FPF2500-FPF2506 IntelliMAX™ Advanced Load Management Products
Electrical Characteristics Cont.
V
IN
= 4.5 to 20V, T
A
= -40 to +85°C unless otherwise noted. Typical values are at V
IN
= 12V and T
A
= 25°C
.
Parameter
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
Symbol
V
IH
V
IL
I
SWOFF
Conditions
V
IN
= 4.5V to 20V
V
IN
= 4.5V to 20V
V
ON
= 5V or GND
V
ON
= 0V, V
OUT
= 0V
V
IN
= 5V, I
SINK
= 10mA
V
IN
= 5V, Switch on
FPF2503
FPF2504
Min.
0.9
Typ.
Max.
0.4
Unit
V
V
µA
µA
V
µA
-1
0.01
0.1
1
0.2
1
400
800
600
1200
800
1600
mA
Current Limit
I
LIM
T
A
=25 °C
FPF2505
FPF2506
FPF2500
FPF2501
FPF2502
0.7xI
NOM
1.0xI
NOM
1.3xI
NOM
Thermal Shutdown
Under Voltage Shutdown
Under Voltage Shutdown Hysteresis
Dynamic
Turn on time
Turn off time
V
OUT
Rise Time
V
OUT
Fall Time
Over Current Blanking Time
Auto-Restart Time
Short Circuit Response Time
t
ON
t
OFF
t
R
t
F
t
BLANK
t
RESTART
UVLO
T
J
Increasing
T
J
Decreasing
V
IN
Increasing
3.75
140
130
3.85
100
4.00
°C
°C
V
mV
ms
ms
ms
ms
10
1280
ms
ms
µs
R
L
=500Ω,
C
L
=1uF
R
L
=500Ω,
C
L
=1uF
R
L
=500Ω,
C
L
=1uF
R
L
=500Ω,
C
L
=1uF
FPF2500, FPF2501, FPF2503,
FPF2505
FPF2500, FPF2503, FPF2505
V
IN
= 12V, V
ON
= 5V
Moderate Overcurrent Condition
2.5
320
1
0.1
3
1.5
5
640
3
Note 1: Package power dissipation on 1square inch pad, 2 oz. copper board.
4
FPF2500-FPF2506 Rev. D4
www.fairchildsemi.com
FPF2500-FPF2506 IntelliMAX™ Advanced Load Management Products
Typical Characteristics
80
80
V
ON
= 5V
75
SUPPLY CURRENT (uA)
70
65
60
55
50
45
75
V
IN
= 20V
SUPPLY CURRENT (uA)
70
65
60
55
50
4
6
8
10
12
14
16
18
20
V
IN
= 12V
V
IN
= 4.5V
SUPPLY VOLTAGE (V)
40
-40
-15
10
35
o
60
85
T
J
, JUNCTION TEMPERATURE ( C)
Figure 1. Quiescent Current vs. Input Voltage
Figure 2. Quiescent Current vs. Temperature
8.0
7.5
SUPPLY CURRENT (uA)
7.0
6.5
6.0
5.5
5.0
4.5
4.0
-40
V
IN
= 12V
I_SHDN
V
IN
= 20V
SUPPLY CURRENT (uA)
0.036
I_SWOFF
0.032
0.028
V
IN
= 20V
0.024
V
IN
= 12V
0.02
-15
10
35
o
60
85
0.016
-40
-15
10
35
o
60
85
T
J
, JUNCTION TEMPERATURE ( C)
T
J
, JUNCTION TEMPERATURE ( C)
Figure 3. I
SHUTDOWN
Current vs. Temperature
Figure 4. I
SWITCH-OFF
Current vs. Temperature
0.80
0.75
ON THRESHOLD (V)
0.70
0.65
0.60
0.55
0.50
4
6
8
10
12
14
16
18
20
V
IN
, Input Voltage (V)
320
V
IN
= 12V
300
280
R
ON
(mOhms)
260
240
220
200
180
160
-40
-15
10
35
60
85
T
J
, JUNCTION TEMPERATURE (
o
C)
Figure 5. V
IH
vs. V
IN
Figure 6. R
(ON)
vs. Temperature
5
FPF2500-FPF2506 Rev. D4
www.fairchildsemi.com
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