SC220EVB 데이터 시트보기 (PDF) - Semtech Corporation
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SC220EVB Datasheet PDF : 14 Pages
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Typical Characteristics
Efficiency vs. Load Current
100 % VOUT = 1.8V
90 %
VIN = 3.7V
VIN = 2.7V
80 %
70 %
60 %
50 %
VIN = 4.2V
40 %
30 %
20 %
10 %
0
0.001
0.01
0.1
1
Load Current (A)
Efficiency vs. Load Current
(Chip Inductor vs. X-EMITM Inductor)
VOUT = 1.8V
100 %
90 %
VIN = 2.7V
VIN = 3.7V
80 %
70 %
60 %
50 %
40 %
VIN = 4.2V
30 %
20 %
10 %
0 0.001
Dashed Lines: Efficiency with X-EMITM Inductor
Solid Lines: Efficiency with chip Inductor
0.01
0.1
1
Load Current (A)
Switching Frequency vs. VIN
VOUT = 1.8V
22.5
20.0
IOUT = 200mA
17.5
15.0
12.5
10.0
IOUT = 300mA
7.5
IOUT = 450mA
5.0
2.5
IOUT = 650mA
0
2.5 3.0
3.5
4.0
4.5
5.0
5.5
Input Voltage (V)
SC220 x
SC220Q
Efficiency vs. VIN
VOUT = 1.8V
100 %
IOUT = 300mA
90 %
80 %
70 %
60 %
50 %
40 %
IOUT = 1mA
IOUT = 50mA
30 %
20 %
10 %
0
2.5
3.0
3.5
4.0
Input Voltage (V)
4.5
5.0
Load Regulation
Nominal VOUT = 1.8V
1.80
VIN = 5.0V
1.79
VIN = 4.2V
1.78
VIN = 2.7V
VIN = 3.7V
1.77
0.001
0.01
0.1
1
Load Current (A)
Switching Frequency vs. VIN
VOUT = 1.0V
22.5
20.0
17.5
15.0
12.5
IOUT = 650mA
IOUT = 200mA
IOUT = 300mA
IOUT = 450mA
10.0
7.5
5.0
2.5
0
2.5 3.0
3.5
4.0
4.5
5.0
5.5
Input Voltage (V)
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