SC121 View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
'SC121' PDF : 23 Pages View PDF
SC121
Typical Characteristics — V = 4.0V
OUT
Efficiency vs. I (V = 4.0V)
OUT OUT
R1 = 976kΩ, R2 = 412kΩ, L = 4.7μH, CFB = 22pF, TA = 25οC
100
V = 3.6V
90
IN
80
70
V = 1.2V
IN
60
50
V = 2.4V
40
IN
30
20
10
0
0.1 0.2 0.5 1 2
5 10 20
IOUT (mA)
50 100 200 500
Load Regulation (V = 4.0V)
OUT
R1 = 976kΩ, R2 = 412kΩ, L = 4.7μH, CFB = 22pF, TA = 25οC
4.1
4.05
4
V = 3.6V
IN
3.95
V = 1.2V
IN
3.9
VIN = 2.4V
3.85
0
50 100 150 200 250 300 350 400 450 500 550
IOUT (mA)
Line Regulation — Low Load (V = 4.0V)
OUT
R1 = 976kΩ, R2 = 412kΩ, L = 4.7μH, CFB = 22pF, IOUT = 1mA
4.1
4.05
T = 85°C
A
4
3.95
T = –40°C
A
3.9
T = 25°C
A
3.85
0.8
1.2
1.6
2
2.4
2.8
3.2
3.6
VIN (V)
Efficiency vs. I (V = 4.0V)
OUT OUT
R1 = 976kΩ, R2 = 412kΩ, L = 4.7μH, CFB = 22pF, VIN = 2.4V
100
T = –40°C
A
90
80
T = 85°C
A
70
60
50
T = 25°C
A
40
30
20
10
0
0.1 0.2 0.5 1 2
5 10 20
IOUT (mA)
50 100 200 500
Load Regulation (VOUT = 4.0V)
R1 = 976kΩ, R2 = 412kΩ, L = 4.7μH, CFB = 22pF, VIN = 2.4V
4.1
4.05
4
T = 25°C
A
3.95
3.9
T = 85°C
A
T = –40°C
A
3.85
0
50 100 150 200 250 300 350 400 450 500 550
IOUT (mA)
Line Regulation — High Load (VOUT = 4.0V)
R1 = 976kΩ, R2 = 412kΩ, L = 4.7μH, CFB = 22pF, IOUT = 110mA
4.1
4.05
4
T = –40°C
A
3.95
T = 85°C
A
3.9
T = 25°C
A
3.85
0.8
1.2
1.6
2
2.4
2.8
3.2
3.6
VIN (V)
9
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