SC121ULTRT Просмотр технического описания (PDF) - Semtech Corporation
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SC121ULTRT Datasheet PDF : 23 Pages
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SC121
Typical Characteristics — V = 5.0V
OUT
Efficiency vs. I (V = 5.0V)
OUT OUT
R1 = 931kΩ, R2 = 294kΩ, L = 4.7μH, CFB = 22pF, TA = 25οC
100
VIN = 4.2V
90
80
70
60
V = 1.2V
IN
50
VIN = 2.2V
40
V = 3.2V
IN
30
20
10
0
0.1 0.2 0.5 1 2
5 10 20
IOUT (mA)
50 100 200 500
Load Regulation (VOUT = 5.0V)
R1 = 931kΩ, R2 = 294kΩ, L = 4.7μH, CFB = 22pF, TA = 25οC
5.05
5
4.95
V = 4.2V
IN
4.9
4.85
V = 1.2V
IN
VIN = 2.2V
V = 3.2V
IN
4.8
0
50 100 150 200 250 300 350 400 450 500 550
IOUT (mA)
Line Regulation — Low Load (VOUT = 5.0V)
R1 = 931kΩ, R2 = 294kΩ, L = 4.7μH, CFB = 22pF, IOUT = 1mA
5.05
5
TA = –40°C
4.95
T = 85°C
A
TA = 25°C
4.9
4.85
4.8
0.5 1
1.5 2
2.5 3
3.5 4
4.5
VIN (V)
Efficiency vs. IOUT (VOUT = 5.0V)
R1 = 931kΩ, R2 = 294kΩ, L = 4.7μH, CFB = 22pF, VIN = 3.6V
100
90
TA = –40°C
T = 85°C
80
A
70
60
T = 25°C
50
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 = 5.0V)
R1 = 931kΩ, R2 = 294kΩ, L = 4.7μH, CFB = 22pF, VIN = 3.6V
5.05
5
4.95
4.9
T = 25°C
A
4.85
T = –40°C
A
T = 85°C
A
4.8
0
50 100 150 200 250 300 350 400 450 500 550
IOUT (mA)
Line Regulation — High Load (VOUT = 5.0V)
R1 = 931kΩ, R2 = 294kΩ, L = 4.7μH, CFB = 22pF, IOUT = 85mA
5.05
5
TA = –40°C
4.95
T = 85°C
A
4.9
4.85
T = 25°C
A
4.8
0.5 1
1.5 2
2.5 3
3.5 4
4.5
VIN (V)
11
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