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PDF FPF2148 Datasheet ( Hoja de datos )

Full Function Load Switch - Fairchild Semiconductor

Número de pieza FPF2148
Descripción Full Function Load Switch
Fabricantes Fairchild Semiconductor 
Logotipo Fairchild Semiconductor Logotipo
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FPF2148 datasheet

1 Page

FPF2148 pdf
Typical Characteristics
90
85
80
75
70
65
60
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
110
105
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)
85
Figure 2. Quiescent Current vs. Temperature
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)
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 3. VONB High Voltage vs. Input Voltage
Figure 4. VONB Low Voltage vs. Input Voltage
200
190
180
170
160
150
140
130
120
110
100
90
80
1
234
VIN, 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
FPF2148 Rev. H
5 www.fairchildsemi.com

5 Page

FPF2148 arduino
Application Notes
Startup Power Sequence
VIN1 FPF2148 VOUT1
VIN1
ON OFF
PGOOD
ONB
GND
FLAGB
100K
VIN2 Any Active HI VOUT2
Load Switch
VIN2
FLAGB
ON GND
To Load
To Load
Power good function in sequential startup. No battery is loaded to the output
Sequential Startup using Power Good
The power good pin can be connected to another active high
load switch’s enable pin to implement sequential startup.
PGOOD pin asserts low when the load switch is OFF. This
feature allows driving a subsequent circuit. The diagram above
illustrates power good function in sequential startup. As the
VOUT1 of the FPF2148 starts to ramp to the 90% of its input
voltage the active high switch remains in OFF state. Whereas
the VOUT1 passes the 90% threshold, power good signal
becomes active and asserts high. This signal will turn on the
active high load switch and VOUT2 will start to increase. The
total startup time may vary according to the difference between
supply voltages that are used in the application.
FPF2148 Rev. H
10 www.fairchildsemi.com

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