FPF2174 IntelliMAX™ Advanced Load Management Products
May 2006
FPF2174
IntelliMAX™ Advanced Load Management Products
Features
1.8 to 5.5V Input Voltage Range
Controlled Turn-On
200mA Current Limit Option
Undervoltage Lockout
Thermal Shutdown
<1µA Shutdown Current
Fast Current limit Response Time
3µs to Moderate Over Currents
20ns to Hard Shorts
Integrated very low V
F
Schottky Diode for
Reverse Current Blocking
Integrated Zener Diode for Output Clamp
tm
General Description
The FPF2174 is a load switch which combines the functionality
of the IntelliMAX
TM
series load switch with a very low forward
voltage drop Schottky barrier rectifier and a zener clamp at the
output. The integrated solution provides full protection to
systems and loads which may encounter large current
conditions in a very compact MLP 3x3 package. This device
contain a 0.125Ω current-limited P-channel MOSFET which can
operate over an input voltage range of 1.8-5.5V. The Schottky
diode acts as a barrier so that no reverse current can flow 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. If the constant current condition
still persists after 10ms, these parts will shut off the switch and
pull the fault signal pin (FLAGB) low. The switch will remain off
until the ON pin is cycled. The minimum current limit is 200mA.
These parts are available in a space-saving 6L MLP 3x3
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
FPF2174
OFF ON
ON
GND
FLAGB
©2006 Fairchild Semiconductor Corporation
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FPF2174 Rev. B1
FPF2174 IntelliMAX™ Advanced Load Management Products
Functional Block Diagram
V
IN
V
OUT
UVLO
ON
CONTROL
LOGIC
CURRENT
LIMIT
THERMAL
SHUTDOWN
FLAGB
GND
Pin Configuration
1
2
3
8
7
6
5
4
3x3 MLP BOTTOM VIEW
Pin Description
Pin
1
2
3, 7
4
5
6
8
Name
V
IN
NC
V
OUT
GND
FLAGB
ON
PAD1
No Connect
Function
Supply Input: Input to the power switch and the supply voltage for the IC
Switch Output: Output of the power switch
Ground
Fault Output: Active LO, open drain output which indicates an over current supply,
under voltage or over temperature state.
ON Control Input
IC substrate. Can be connected to GND. Do not connect to other pins.
FPF2174 Rev.B1
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FPF2174 IntelliMAX™ Advanced Load Management Products
Absolute Maximum Ratings
Parameter
V
IN
, ON, FLAGB to GND
V
OUT
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
Min.
-0.3
-0.3
-
-40
-65
-
4000
400
Max.
6
20
1.4
85
150
70
-
-
Unit
V
V
W
°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
Latch-off
Current
Reverse Block
Leakage Current
Reverse
Breakdown Voltage
Dropout Voltage
Symbol
V
IN
I
Q
I
SHDN
I
LATCHOFF
I
R
Conditions
Min.
1.8
Typ.
-
95
110
-
50
-
15
0.3
0.23
0.36
-
-
-
-
-
-
-
-
-
Max
5.5
-
200
1
-
10
-
0.4
-
-
-
-
0.5
1.0
1
1
0.2
0.3
1
Units
V
µA
µA
µA
µA
V
V
I
OUT
= 0mA
V
ON
ACTIVE
V
IN
= 1.8 to 3.3V
V
IN
= 3.3 to 5.5V
-
-
-
-
-
-
-
-
0.75
1.3
-
-
-
-
-
-
-
V
ON
= 0V, I
OUT
= 0mA
V
ON
=V
IN
, after an overcurrent fault
V
OUT
= 12V, V
IN
= V
ON
= 0V,
T
A
= 25°C
I
OUT
= 1mA
V
DROP
T
A
= 25°C, I
OUT
= 150mA
T
A
= 85°C, I
OUT
= 150mA
T
A
= -40°C, I
OUT
= 150mA
ON Input Logic
High Voltage (ON)
ON Input Logic Low
Voltage
ON Input Leakage
Off Switch Leakage
FLAGB Output
Logic Low Voltage
FLAGB Output High Leakage Current
V
IH
V
IL
V
IN
= 1.8V
V
IN
= 5.5V
V
IN
= 1.8V
V
IN
= 5.5V
V
ON
= V
IN
or GND
V
V
µA
µA
V
µA
I
SWOFF
V
ON
= 0V, V
OUT
= 0V
V
IN
= 5V, I
SINK
= 10mA
V
IN
= 1.8V, I
SINK
= 10mA
V
IN
= 5V, Switch on
FPF2174 Rev.B1
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FPF2174 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
Protections
Current Limit
Thermal Shutdown
Symbol
I
LIM
Conditions
V
IN
= 3.3V, V
OUT
= 2.0V
Shutdown Threshold
Return from Shutdown
Hysteresis
Min.
200
-
-
-
1.5
-
-
-
-
-
-
-
5
-
-
Typ.
300
140
130
10
1.6
47
15
-
25
20
14
126
10
3
20
Max
400
-
-
-
1.7
-
-
10
50
40
30
250
20
-
-
Units
mA
°C
Under Voltage Shutdown
Under Voltage Shutdown Hysteresis
Zener Clamp Voltage
Zener Leakage
Dynamic
Turn on time
Turn off time
V
OUT
Rise Time
V
OUT
Fall Time
Over Current Blanking Time
Short Circuit Response Time
UVLO
V
Z
I
Z
t
ON
t
OFF
t
R
t
F
t
BLANK
V
IN
Increasing
I
Z
= 1mA
V
Z
= 12V
RL=500Ω,
CL=0.1µF
RL=500Ω,
CL=0.1µF
RL=500Ω,
CL=0.1µF
RL=500Ω,
CL=0.1µF
V
IN
= V
ON
= 3.3V. Moderate
Over-Current Condition.
V
IN
= V
ON
= 3.3V. Hard Short.
V
mV
V
µA
µs
µs
µs
µs
ms
µs
ns
Note 1: Package power dissipation on 1 spuare inch pad, 2 oz copper board.
FPF2174 Rev.B1
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FPF2174 IntelliMAX™ Advanced Load Management Products
Typical Characteristics
120
SUPPLY CURRENT (uA)
SUPPLY CURRENT (uA)
120
V
ON
= V
IN
V
IN
= 5.5V
110
100
90
80
70
60
1.5
110
100
90
V
IN
= 3.3V
V
IN
= 1.8V
80
70
60
-40
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
-15
10
35
60
85
SUPPLY VOLTAGE (V)
T
J
,
JUNCTION TEMPERATURE
(
o
C
)
Figure 1. Quiescent Current vs. Input Voltage
Figure 2. Quiescent Current vs. Temperature
2.0
1.8
SUPPLY CURRENT (uA)
0.6
SUPPLY CURRENT (uA)
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
-40
-15
10
35
V
IN
= 5.5V
V
IN
= 3.3V
0.5
0.4
0.3
0.2
0.1
0.0
-40
V
IN
= 5.5V
V
IN
= 3.3V
60
85
T
J
,
JUNCTION
TEMPERATURE
(
o
C
)
-15
10
35
60
T
J
,
JUNCTION TEMPERATURE
(
o
C
)
85
Figure 3. I
SHUTDOWN
Current vs. Temperature
Figure 4. I
SWITCH-OFF
Current vs. Temperature
60
V
IN
= 3.3V
1.8
1.6
SUPPLY CURRENT (uA)
50
ON THRESHOLD (V)
1.4
1.2
1.0
0.8
0.6
40
30
20
-40
-15
10
35
60
85
0.4
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
T
J
,
JUNCTION TEMPERATURE
(
o
C
)
V
IN
,INUT VOLTAGE (V)
Figure 5. Latchoff current vs. Temperature
Figure 6. Input Voltage vs. On Threshold Voltage
FPF2174 Rev.B1
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