Fairchild FPF2174 Intellimax advanced load management product Datasheet

FPF2174
IntelliMAX™ Advanced Load Management Products
tm
Features
General Description
„ 1.8 to 5.5V Input Voltage Range
The FPF2174 is a load switch which combines the functionality
of the IntelliMAXTM 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.
„ 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 VF Schottky Diode for
Reverse Current Blocking
„ Integrated Zener Diode for Output Clamp
Applications
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.
„ PDAs
„ Cell Phones
„ GPS Devices
„ MP3 Players
These parts are available in a space-saving 6L MLP 3x3
package.
„ Digital Cameras
„ Peripheral Ports
„ Hot Swap Supplies
Typical Application Circuit
TO LOAD
VOUT
VIN
FPF2174
OFF ON
ON
FLAGB
GND
©2006 Fairchild Semiconductor Corporation
FPF2174 Rev. B1
1
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FPF2174 IntelliMAX™ Advanced Load Management Products
May 2006
VOUT
VIN
UVLO
CONTROL
LOGIC
ON
CURRENT
LIMIT
THERMAL
SHUTDOWN
FLAGB
GND
Pin Configuration
1
8
6
3
2
7
5
4
3x3 MLP BOTTOM VIEW
Pin Description
Pin
Name
Function
1
VIN
Supply Input: Input to the power switch and the supply voltage for the IC
2
NC
No Connect
3, 7
VOUT
Switch Output: Output of the power switch
4
GND
Ground
5
FLAGB
6
ON
8
PAD1
FPF2174 Rev.B1
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.
2
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FPF2174 IntelliMAX™ Advanced Load Management Products
Functional Block Diagram
Parameter
Min.
Max.
Unit
VIN, ON, FLAGB to GND
-0.3
6
V
VOUT to GND
-0.3
20
V
Power Dissipation @ TA = 25°C ( note 1)
-
1.4
W
Operating Temperature Range
-40
85
°C
Storage Temperature
-65
150
°C
-
70
°C/W
HBM
4000
-
V
MM
400
-
V
Thermal Resistance, Junction to Ambient
Electrostatic Discharge Protection
Recommended Operating Range
Parameter
Min.
Max.
Unit
VIN
1.8
5.5
V
Ambient Operating Temperature, TA
-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.
Typ.
Max
Units
1.8
-
5.5
V
µA
Basic Operation
Operating Voltage
VIN
Quiescent Current
IQ
IOUT = 0mA
VIN = 1.8 to 3.3V
-
95
-
VON ACTIVE
VIN = 3.3 to 5.5V
-
110
200
Shutdown Current
ISHDN
VON = 0V, IOUT = 0mA
-
-
1
µA
Latch-off Current
ILATCHOFF
VON =VIN, after an overcurrent fault
-
50
-
µA
Reverse Block
Leakage Current
IR
VOUT = 12V, VIN = VON = 0V,
TA = 25°C
-
-
10
µA
IOUT = 1mA
-
15
-
V
TA = 25°C, IOUT = 150mA
-
V
Reverse
Breakdown Voltage
Dropout Voltage
VDROP
TA = 85°C, IOUT = 150mA
TA = -40°C, IOUT = 150mA
ON Input Logic
High Voltage (ON)
VIH
ON Input Logic Low
Voltage
VIL
ON Input Leakage
Off Switch Leakage
FLAGB Output
Logic Low Voltage
FLAGB Output High Leakage Current
FPF2174 Rev.B1
ISWOFF
0.3
0.4
0.23
-
-
0.36
-
VIN = 1.8V
0.75
-
-
VIN = 5.5V
1.3
-
-
VIN = 1.8V
-
-
0.5
VIN = 5.5V
-
-
1.0
VON = VIN or GND
-
-
1
µA
V
V
VON = 0V, VOUT = 0V
-
-
1
µA
VIN = 5V, ISINK = 10mA
-
-
0.2
V
VIN = 1.8V, ISINK = 10mA
-
-
0.3
VIN = 5V, Switch on
-
-
1
3
µA
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FPF2174 IntelliMAX™ Advanced Load Management Products
Absolute Maximum Ratings
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
Typ.
Max
Units
200
300
400
mA
-
140
-
°C
Return from Shutdown
-
130
-
Hysteresis
-
10
-
1.5
1.6
1.7
V
-
47
-
mV
Conditions
Min.
Protections
Current Limit
ILIM
Thermal Shutdown
Under Voltage Shutdown
VIN = 3.3V, VOUT = 2.0V
Shutdown Threshold
UVLO
VIN Increasing
Under Voltage Shutdown Hysteresis
Zener Clamp Voltage
VZ
IZ = 1mA
-
15
-
V
Zener Leakage
IZ
VZ = 12V
-
-
10
µA
Turn on time
tON
RL=500Ω, CL=0.1µF
-
25
50
µs
Turn off time
tOFF
RL=500Ω, CL=0.1µF
-
20
40
µs
VOUT Rise Time
tR
RL=500Ω, CL=0.1µF
-
14
30
µs
VOUT Fall Time
tF
RL=500Ω, CL=0.1µF
Over Current Blanking Time
tBLANK
Dynamic
Short Circuit Response Time
-
126
250
µs
5
10
20
ms
VIN = VON = 3.3V. Moderate
Over-Current Condition.
-
3
-
µs
VIN = VON = 3.3V. Hard Short.
-
20
-
ns
Note 1: Package power dissipation on 1 spuare inch pad, 2 oz copper board.
FPF2174 Rev.B1
4
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FPF2174 IntelliMAX™ Advanced Load Management Products
Electrical Characteristics Cont.
120
VIN = 5.5V
VON = VIN
110
SUPPLY CURRENT (uA)
SUPPLY CURRENT (uA)
120
100
90
80
70
60
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
110
VIN = 3.3V
100
90
VIN = 1.8V
80
70
60
-40
6.0
-15
SUPPLY VOLTAGE (V)
Figure 1. Quiescent Current vs. Input Voltage
35
60
85
Figure 2. Quiescent Current vs. Temperature
0.6
2.0
SUPPLY CURRENT (uA)
1.8
SUPPLY CURRENT (uA)
10
TJ, JUNCTION TEMPERATURE(oC)
1.6
1.4
1.2
1.0
0.8
VIN = 5.5V
0.6
0.4
VIN = 3.3V
0.2
0.0
-40
-15
10
35
60
0.5
0.4
0.3
VIN = 5.5V
0.2
VIN = 3.3V
0.1
0.0
-40
85
TJ, JUNCTION TEMPERATURE(oC)
Figure 3. ISHUTDOWN Current vs. Temperature
-15
10
35
60
TJ, JUNCTION TEMPERATURE(oC)
85
Figure 4. ISWITCH-OFF Current vs. Temperature
1.8
60
1.6
ON THRESHOLD (V)
SUPPLY CURRENT (uA)
VIN = 3.3V
50
40
30
1.4
1.2
1.0
0.8
0.6
20
-40
-15
TJ, JUNCTION
10
35
60
0.4
1.5
85
Figure 5. Latchoff current vs. Temperature
FPF2174 Rev.B1
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
VIN,INUT VOLTAGE (V)
TEMPERATURE(oC)
Figure 6. Input Voltage vs. On Threshold Voltage
5
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FPF2174 IntelliMAX™ Advanced Load Management Products
Typical Characteristics
400
375
OUTPUT CURRENT (mA)
OUTPUT CURRENT (mA)
400
350
325
300
275
250
225
200
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
350
300
250
200
-40
5.5 6.0
-15
60
85
TJ, JUNCTION TEMPERATURE ( C)
Figure 7. Current Limit vs. Output Voltage
Figure 8. Current Limit vs. Temperature
345
500
DROPOUT VOLTAGE (mV)
IOUT = 150mA
330
315
300
285
VIN = 3.3V
IOUT = 150mA
450
400
350
300
250
200
150
270
1
2
3
4
5
100
-40
6
10
35
60
85
o
TJ,JUNCTION TEMPERATURE ( C)
Figure 9. Drop Voltage vs. Input Voltage
Figure 10. Drop Voltage vs. Temperature
16.0
40
15.9
35
15.8
15.7
15.6
30
TON
25
20
TOFF
15
15.5
15.4
-15
VIN, INPUT VOLTAGE (V)
DELAY TIMES (uS)
DROPOUT VOLTAGE (mV)
35
o
V IN ,IN UT VOLTAG E (V)
ZENER VOLTAGE (V)
10
0
5
10
15
10
-40
20
10
35
60
85
o
ZENER CURRENT (mA)
Figure 12. TON/TOff vs. Temperature
Figure 11. Zener Voltage vs. Zener Current
FPF2174 Rev.B1
-15
TJ, JUNCTION TEMPERATURE ( C)
6
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FPF2174 IntelliMAX™ Advanced Load Management Products
Typical Characteristics
14
FLAG-BLANKING TIME (mS)
DELAY TIMES (uS)
1000
TFALL
100
TRISE
10
1
-40
-15
10
35
60
13
12
11
10
9
8
-40
85
10
35
60
85
TJ, JUNCTION TEMPERATURE ( C )
TJ, JUNCTION TEMPERATURE ( C)
Figure 13. TRise/TFall vs. Temperature
Figure 14. TBLANK vs Temperature
V DRV
2V/DIV
VIN = VON =3.3V
CIN=10uF
CL=0.1uF
VON
2V/DIV
IOUT
200mA/DIV
VIN=3.3V
CIN=10uF
CL=0.1uF
RLOAD=500Ω
IOUT
10mA/DIV
VOUT
2V/DIV
5ms/DIV
100us/DIV
Figure 15. TBLANK Response
VON
2V/DIV
-15
o
o
FLAGB
2V/DIV
V IN = 3.3V
Figure 16. TON Response
VIN=3.3V
CIN=10uF
CL=0.1uF
RLOAD=500Ω
VOUT
2V/DIV
CIN=10uF
CL=0.1uF
IOUT
5A/DIV
IOUT
10mA/DIV
VIN
2V/DIV
200ns/DIV
20us/DIV
Figure 18. Short Circuit Response Time
(Output Shorted to GND)
Figure 17. TOFF Response
FPF2174 Rev.B1
7
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FPF2174 IntelliMAX™ Advanced Load Management Products
Typical Characteristics
VIN
2V/DIV
CIN=10uF
CL=0.1uF
VIN
2V/DIV
CIN=10uF
CL=0.1uF
RL=4.7Ω
VON
2V/DIV
IOUT
200mA/DIV
IOUT
200mA/DIV
50us/DIV
50uS/DIV
Figure 19. Current Limit Response Time
(Switch power up to hard short)
FPF2174 Rev.B1
Figure 20. Current Limit Response Time
(Output has a 4.7Ω load)
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FPF2174 IntelliMAX™ Advanced Load Management Products
Typical Characteristics
Thermal Shutdown
The FPF2174 is a current limited switch that protects systems
and loads which can be damaged or disrupted by the
application of high currents. The core of the device is a 0.125Ω
P-channel MOSFET and a controller capable of functioning over
a wide input operating range of 1.8-5.5V paired with a low
forward voltage drop Schottky diode for reverse blocking and a
16V zener diode for output clamp. The controller protects
against system malfunctions through current limiting, undervoltage lockout and thermal shutdown. The current limit is
preset for 200mA.
The thermal shutdown protects the die from internally or
externally generated excessive temperatures.
During an
over-temperature condition the FLAGB is activated and the
switch is turned-off. The switch automatically turns-on again if
temperature of the die drops below the threshold temperature.
On/Off Control
The ON pin controls the state of the switch. Activating ON
continuously holds the switch in the on state so long as there is
no under-voltage on VIN or a junction temperature in excess of
150°C. ON is active HI and has a low threshold making it
capable of interfacing with low voltage signals. When the
MOSFET is off, the Schottky diode acts as a barrier so that no
reverse current can flow when VOUT is greater than VIN.
Fault Reporting
Upon the detection of an over-current, an input under-voltage,
or an over-temperature condition, the FLAGB signals the fault
mode by activating LO. The FLAGB goes LO at the end of the
blanking time and is latched LO and ON must be toggled to
release it. FLAGB is an open-drain MOSFET which requires a
pull-up resistor between VIN and FLAGB. During shutdown, the
pull-down on FLAGB is disabled to reduce current draw from
the supply.
Current Limiting
The current limit guarantees that the current through the switch
doesn't exceed a maximum value while not limiting at less than
a minimum value. The minimum current is 200mA and the
maximum current is 400mA. The device has a blanking time of
10ms, nominally, during which the switch will act as a constant
current source. At the end of the blanking time, the switch will
be turned-off and the FLAGB pin will activate to indicate that
current limiting has occurred.
Under-Voltage Lockout
The under-voltage lockout turns-off the switch if the input
voltage drops below the under-voltage lockout threshold. With
the ON pin active the input voltage rising above the
under-voltage lockout threshold will cause a controlled turn-on
of the switch which limits current over-shoots.
Ordering Information
Part
Current Limit
[mA]
Current Limit
Blanking Time
[ms]
Auto-Restart
Time
[ms]
ON Pin
Activity
Top Mark
FPF2174
200
10
NA
Active HI
2174
FPF2174 Rev.B1
9
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FPF2174 IntelliMAX™ Advanced Load Management Products
Description of Operation
Typical Application
To Load
VOUT
VIN
FPF2174
Battery
5.5V
OFF ON
C1 = 10µF
ON
R1 = 100KΩ
FLAGB
GND
5.5V MAX
C2 = 0.1µF
Input Capacitor
To limit the voltage drop on the input supply caused by transient
in-rush currents when the switch turns-on into a discharged load
capacitor or a short-circuit, a capacitor needs to be placed
between VIN and GND. A 0.1uF ceramic capacitor, CIN, placed
close to the pins is usually sufficient. Higher values of CIN can
be used to further reduce the voltage drop.
Output Capacitor
A 0.1uF capacitor COUT, should be placed between VOUT and
GND. This capacitor will prevent parasitic board inductances
from forcing VOUT below GND when the switch turns-off.
Power Dissipation
During normal operation as a switch, the power dissipation is
small and has little effect on the operating temperature of the
part. The parts with the higher current limits will dissipate the
most power and that will only be typically,
P = I LIM × V DROP = 0.4 × 0.4 = 160mW
(2)
When using the part, attention must be given to the manual
resetting of the part. Continuously resetting the part at a high
duty cycle when a short on the output is present can cause the
temperature of the part to increase. The junction temperature
will only be allowed to increase to the thermal shutdown
threshold. Once this temperature has been reached, toggling
ON will not turn-on the switch until the junction temperature
drops.
Board Layout
For best performance, all traces should be as short as possible.
To be most effective, the input and output capacitors should be
placed close to the device to minimize the effects that parasitic
trace inductances may have on normal and short-circuit
operation. Using wide traces for VIN, VOUT and GND will help
minimize parasitic electrical effects along with minimizing the
case to ambient thermal impedance.
FPF2174 Rev.B1
10
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FPF2174 IntelliMAX™ Advanced Load Management Products
Application Information
FPF2174 IntelliMAX™ Advanced Load Management Products
Dimensional Outline and Pad Layout
Package MLP06H
FPF2174 Rev.B1
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which, (a) are intended for surgical implant into the body, or
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when properly used in accordance with instructions for use
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PRODUCT STATUS DEFINITIONS
Definition of Terms
Datasheet Identification
Product Status
Definition
Advance Information
Formative or In
Design
This datasheet contains the design specifications for
product development. Specifications may change in
any manner without notice.
Preliminary
First Production
This datasheet contains preliminary data, and
supplementary data will be published at a later date.
Fairchild Semiconductor reserves the right to make
changes at any time without notice in order to improve
design.
No Identification Needed
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any time without notice in order to improve design.
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This datasheet contains specifications on a product
that has been discontinued by Fairchild semiconductor.
The datasheet is printed for reference information only.
Rev. I19
FPF2174 Rev.B1
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FPF2174 IntelliMAX™ Advanced Load Management Products
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