SC121 Просмотр технического описания (PDF) - Semtech Corporation
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SC121 Datasheet PDF : 23 Pages
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SC121
Typical Characteristics — V = 3.3V
OUT
Efficiency vs. I (V = 3.3V)
OUT OUT
FB grounded, L = 4.7μH, TA = 25οC
100
90
V = 2.95V
IN
80
70
V = 1.0V
IN
60
V = 2.0V
IN
50
40
30
20
10
0
0.1 0.2 0.5 1 2
5 10 20
IOUT (mA)
50 100 200 500
Load Regulation (V = 3.3V)
OUT
FB grounded, L = 4.7μH, TA = 25οC
3.34
3.32
3.3
V = 2.95V
IN
3.28
3.26
3.24
3.22
V = 1.0V
IN
VIN = 2.0V
3.2
0 50 100 150 200 250 300 350 400 450 500
IOUT (mA)
Line Regulation — Low Load (V = 3.3V)
OUT
FB grounded, L = 4.7μH, IOUT = 1mA
3.34
3.32
T = –40°C
A
3.3
3.28
T = 85°C
A
3.26
3.24
T = 25°C
A
3.22
3.2
0.6 0.8 1
1.2 1.4 1.6 1.8 2
VIN (V)
2.2 2.4 2.6 2.8 3
Efficiency vs. I (V = 3.3V)
OUT OUT
FB grounded, L = 4.7μH, VIN = 2V
100
90
T = –40°C
A
80
T = 85°C
A
70
60
50
40
T = 25°C
A
30
20
10
0
0.1 0.2 0.5 1 2
5 10 20
IOUT (mA)
50 100 200 500
Load Regulation (VOUT = 3.3V)
FB grounded, L = 4.7μH, VIN = 2V
3.34
3.32
T = 25°C
A
3.3
3.28
3.26
3.24
T = 85°C
A
TA = –40°C
3.22
3.2
0 50 100 150 200 250 300 350 400 450 500
IOUT (mA)
Line Regulation — High Load (VOUT = 3.3V)
FB grounded, L = 4.7μH, IOUT = 90mA
3.34
3.32
3.3
T = –40°C
A
3.28
T = 85°C
A
3.26
3.24
T = 25°C
A
3.22
3.2
0.6 0.8 1
1.2 1.4 1.6 1.8 2
VIN (V)
2.2 2.4 2.6 2.8 3
7
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