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PDF FPF2164 Data sheet ( Hoja de datos )
| Número de pieza | FPF2164 | |
| Descripción | (FPF2163 - FPF2165) Full Function Load Switch | |
| Fabricantes | Fairchild Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de FPF2164 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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October 2008
FPF2163/4/5
Full Function Load Switch with Adjustable Current Limit tm
Features
1.8 to 5.5V Input Voltage Range
Controlled Turn-On
0.15-1.5A Adjustable Current Limit
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
RoHS Compliant
Applications
PDAs
Cell Phones
GPS Devices
MP3 Players
Digital Cameras
Peripheral Ports
Hot Swap Supplies
General Description
The FPF2163, FPF2164, and FPF2165 is a series of load
switches which provides full protection to systems and loads
which may encounter large current conditions. These devices
contain a 0.12Ω current-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 parts
operate in a constant-current mode to prohibit excessive
currents from causing damage. For the FPF2163 and FPF2164,
if the constant current condition still persists after 30ms, these
parts will shut off the switch and pull the fault signal pin (FLAGB)
low. The FPF2163 has an auto-restart feature which will turn the
switch on again after 450ms if the ON pin is still active. The
FPF2164 does not have this auto-restart feature so the switch
will remain off until the ON pin is cycled. The FPF2165 will not
turn off after a current limit fault, but will rather remain in the
constant current mode indefinitely. The minimum current limit is
150mA.
These parts are available in a space-saving 6 pin 2X2 MLP
package.
www.DataSheet4U.com
BOTTOM
Pin 1
TOP
Ordering Information
Part
FPF2163
FPF2164
FPF2165
Current Limit
[mA]
150-1500
150-1500
150-1500
Current Limit
Blanking Time
[ms]
15/30/60
15/30/60
0
Auto-Restart
Time
[ms]
225/450/900
NA
NA
ON Pin
Activity
Active HI
Active HI
Active HI
Top
Mark
163
164
165
©2008 Fairchild Semiconductor Corporation
FPF2163/4/5 Rev. I
1
www.fairchildsemi.com
1 page  
Typical Characteristics
78
76
74
72
70
68
66
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
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)
Figure 2. Quiescent Current vs. Temperature
85
1.5
1.4
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
www.DataSheet4U.com
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
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
FPF2163/4/5 Rev. I
5 www.fairchildsemi.com
5 Page 
This is more power than the package can dissipate, but the
thermal shutdown of the part will activate to protect the part from
damage due to excessive heating. When using the FPF2164,
attention must be given to the manual resetting of the part. The
junction temperature will only be able 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. For the FPF2165, a short on the output will
cause the part to operate in a constant current state dissipating
a worst case power of,
P(max) = VIN(max) x ILIM(max)
(5)
= 5.5 x 1.5 = 8.25W
This large amount of power will activate the thermal shutdown
and the part will cycle in and out of thermal shutdown so long as
the ON pin is active and the short is present.
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.
The middle pad (pin 7) should be connected to the GND plate
of PCB for improving thermal performance of the load switch.
An improper layout could result higher junction temperature and
triggering the thermal shutdown protection feature. This concern
applies when the switch is set at higher current limit value and
an overcurrent condition occurs. In this case power dissipation
of the switch (PD = (VIN - VOUT) x ILIM(max)) could exceed the
maximum absolute power dissipation of 1.2W.
www.DataSheet4U.com
FPF2163/4/5 Rev. I
11 www.fairchildsemi.com
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet FPF2164.PDF ] | |
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