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FAN4855 Datasheet(PDF) 5 Page - Fairchild Semiconductor

Part No. FAN4855
Description  500mA High Efficiency Boost Regulator with Adjustable Output, Shutdown and Low Battery Detect
Download  12 Pages
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Maker  FAIRCHILD [Fairchild Semiconductor]
Homepage  http://www.fairchildsemi.com
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FAN4855 Datasheet(HTML) 5 Page - Fairchild Semiconductor

 
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FAN4855 Rev. 1.0.1
Typical Operating Characteristics (L = 10µH, CIN = 47µF, COUT = 47µF/1.0µF, T = 25°C)
Load Current vs. Start-Up Voltage
(Resistive Load)
Input Voltage, V
Efficiency vs. Load Current
Vout = 3.3V
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
90.0
100.0
0.1
1
10
100
1000
Output Current, mA
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
90.0
100.0
0.1
1
10
100
1000
Output Current, mA
Efficiency vs. Load Current
Vout = 5V
SHDN Threshold Voltage
Input Voltage, V
Vin=2.0V
Vin=3V
Vin=1.5V
Vin=3V
Vin=2.0V
Vin=1.5V
0
100
200
300
400
500
600
1.5
2
2.5
3
3.5
4
VOUT = 5V
VOUT = 3.3V
0.5
0.7
0.9
1.1
1.3
1.5
1.7
1.9
2.1
2.3
1.5
2
2.5
3
3.5
4
4.5
Starting Up and Turning Off
VOUT = 3.3V, Iloads = 10mA to 50mA
Input Voltage, V
Starting Up and Turning Off
VOUT = 5V, Iloads = 10mA to 50mA
0
0.5
1
1.5
2
2.5
3
3.5
4
0.6
0.8
1.01.2
1.41.6
1.8
Input Voltage, V
0.6
0.8
1.0
1.2
1.4
1.6
1.8
START UP
START UP
TURN OFF:
TURN OFF:
Iload=50mA
Iload=50mA
Iload=10mA
Iload=10mA
Iload=10mA to 50mA
1
0
2
3
4
5


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