SC121 데이터 시트보기 (PDF) - Semtech Corporation
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SC121 Datasheet PDF : 23 Pages
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Typical Characteristics — V = 1.8V
OUT
Efficiency vs. I (V = 1.8V)
OUT OUT
R1 = 499kΩ, R2 = 1MΩ, L = 4.7μH, CFB = 22pF, TA = 25οC
100
V = 1.6V
90
IN
80
70
V = 0.8V
60
IN
50
VIN = 1.2V
40
30
20
10
0
0.1 0.2
0.5 1
2
5 10 20
IOUT (mA)
50 100 200
Load Regulation (VOUT = 1.8V)
R1 = 499kΩ, R2 = 1MΩ, L = 4.7μH, CFB = 22pF, TA = 25οC
1.82
1.8
V = 1.6V
IN
1.78
V = 0.8V
IN
V = 1.2V
IN
1.76
0
50
100
150
200
250
IOUT (mA)
Line Regulation — Low Load (VOUT = 1.8V)
R1 = 499kΩ, R2 = 1MΩ, L = 4.7μH, CFB = 22pF, IOUT = 1mA
1.82
T = 25°C
A
1.8
1.78
T = –40°C
A
T = 85°C
A
1.76
0.6 0.7 0.8 0.9 1
1.1 1.2 1.3 1.4 1.5 1.6
VIN (V)
SC121
Efficiency vs. I (V = 1.8V)
OUT OUT
R1 = 499kΩ, R2 = 1MΩ, L = 4.7μH, CFB = 22pF, VIN = 1.2V
100
90
T = –40°C
A
80
70
T = 85°C
A
60
50
T = 85°C
A
40
30
T = –40°C
A
20
T = 25°C
A
10
0
0.1 0.2
0.5 1
2
5 10 20
IOUT (mA)
50 100 200
Load Regulation (VOUT = 1.8V)
R1 = 499kΩ, R2 = 1MΩ, L = 4.7μH, CFB = 22pF, VIN = 1.2V
1.82
1.8
1.78
T = –40°C
A
T = 85°C
A
T = 25°C
A
1.76
0
50
100
150
200
250
IOUT (mA)
Line Regulation — High Load (VOUT = 1.8V)
R1 = 499kΩ, R2 = 1MΩ, L = 4.7μH, CFB = 22pF, IOUT = 50mA
1.82
1.8
TA = 25°C
T = –40°C
A
1.78
T = 85°C
A
1.76
0.6 0.7 0.8 0.9 1
1.1 1.2 1.3 1.4 1.5 1.6
VIN (V)
5
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