SP4446EK-L/TR 查看數據表（PDF） - Exar Corporation
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SP4446EK-L/TR Datasheet PDF : 10 Pages
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PERFORMANCE CHARACTERISTICS
Refer to the typical application circuit, TAMB = 25°C, unless otherwise specified.
75
70
65
60
55
50
45
40
35
30
0
Vin=3.3V;Vout = 20V Efficiency
10 uH
22 uH
1
2
3
4
5
6
7
Iout (mA)
75
70
65
60
55
50
45
40
35
0
Vin=5V;Vout = 20V Efficiency
10 uH
22 uH
2
4
6
8
10
12
Iout (mA)
Figure 10. 20V Output Efficiency (VIN=3.3V)
Figure 11. 20V Output Efficiency (VIN=5V)
12
10uH
10
22uH
8
6
4
2
0
2.7 3 3.3 3.6 3.9 4.2 4.5 4.8 5.1
Input Voltage (V)
Figure 12. Maximum Output Current vs. VIN (VOUT=20V)
6
10uH
5
22uH
4
3
2
1
0
2.7
3
3.3 3.6 3.9 4.2 4.5 4.8 5.1
Input Voltage (V)
Figure 13. Maximum Output Current vs. VIN (VOUT=30V)
30
10
25
20
15
10
Tamb=-40°C
5
Tamb=25°C
Tamb=85°C
0
1
2
3
4
5
6
7
8
Input Voltage (V)
Figure 14. Quiescent Current IQ vs. VIN
8
6
4
2
0
1
2
3
4
5
6
7
8
Input Voltage (V)
Figure 15. Shutdown Pin Current vs. VIN
Mar28-08
SP4446 High Output Voltage Boost Regulator, LCD Bias Regulator
7
© 2008 Exar Corporation
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