SC1408IS.TR(2000) 데이터 시트보기 (PDF) - Semtech Corporation
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SC1408IS.TR Datasheet PDF : 12 Pages
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LOW VOLTAGE, BOOST DC-DC
CONTROLLER
SC1408
August 22, 2000
3.5
Vo=3.3V
3.0
L=22uH
2.5
2.0
1.5
20mOhm
25mOhm
35mOhm
3.5
Vo=5V
3.0
L=22uH
2.5
2.0
1.5
1.0
50mOhm
1.0
0.5
0.5
100mOhm
0.0
0.0
2.0
2.2
2.4
2.6
2.8
3.0
3.2
2.0
2.5
3.0
3.5
4.0
Vin (V)
Vin (V)
3.5
Vo=12V
3.0
L=22uH
20mOhm
4.0
Vo=15V
3.5
L=22uH
2.5
3.0
25mOhm
2.5
2.0
2.0
1.5
35mOhm
1.5
1.0
50mOhm
1.0
0.5
0.5
100mOhm
0.0
0.0
2.0
4.0
6.0
8.0
10.0
12.0
2.0
4.0
6.0
8.0
10.0
12.0
Vin (V)
Vin (V)
Figs. 5 - 8: Maximum output current vs. input voltage and sense resistor value. (Boost Mode)
20mOhm
25mOhm
35mOhm
50mOhm
100mOhm
4.5
5.0
20mOhm
25mOhm
35mOhm
50mOhm
100mOhm
14.0
16.0
100%
Vo=5V
100%
Vo=12V
90%
90%
80%
70%
60%
1
100%
Vo=15V
90%
Vin=5.0V
Vin=4.0V
Vin=3.3V
Vin=3.0V
10
100
Io (mA)
1000
80%
70%
60%
1
Vin=5.0V
Vin=3.0V
Vin=1.8V
10
100
Io (mA)
1000
80%
70%
Vin=12V
Vin=9.0V
Vin=5.0V
Vin=3.0V
Vin=1.8V
60%
1
10
100
Io (mA)
1000
Figs. 9-11:Efficiency in the Boost Application circuit of Fig.1
© 2000 SEMTECH CORP.
9
652 MITCHELL ROAD NEWBURY PARK CA 91320
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