SC401B Просмотр технического описания (PDF) - Semtech Corporation
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SC401B Datasheet PDF : 32 Pages
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SC401B
Typical Characteristics
Characteristics in this section are based on using the Typical Application Circuit on page 8.
Efficiency/Power Loss vs. Load — PSAVE
VDD = 3.3V, VOUT = 1.5V
100
VIN = 12V
95
VIN = 5V
90
VIN = 17V
85
5.0
Efficiency
4.0
80
3.0
75
70
VIN = 17V
65
VIN = 12V
60
55
VIN = 5V
PLOSS
2.0
1.0
50
0.0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
IOUT (A)
Efficiency/Power Loss — PSAVE vs. FCM
VDD = 3.3V, VOUT = 1.5V, VIN = 12V
100
0.2750
95 PSAVE
90
85
FCM
0.2425
0.2100
0.1775
80
0.1450
75
0.1125
70
0.0800
65
0.0475
60
FCM minus PSM
0.0150
55
-0.0175
50
-0.0500
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
IOUT (A)
Efficiency/Power Loss vs. Load — PSAVE
VDD = 5V, VOUT = 1.5V
100
5.0
95
VIN = 12V
VIN = 5V
90
VIN = 17V
85
Efficiency
4.0
80
3.0
75
70
VIN = 17V
65
VIN = 12V
60
VIN = 5V
55
PLOSS
2.0
1.0
50
0.0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
IOUT (A)
Efficiency/Power Loss — PSAVE vs. FCM
VDD = 5V, VOUT = 1.5V, VIN = 12V
100
0.3000
95
PSAVE
90
85
FCM
0.2675
0.2350
0.2025
80
0.1700
75
0.1375
70
0.1050
65
0.0725
60
FCM minus PSM
55
0.0400
0.0075
50
-0.0250
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
IOUT (A)
Efficiency/Power Loss vs. Load — FCM
VDD = 5V, VOUT = 1.5V
100
VIN = 12V
95
VIN = 5V
90
VIN = 17V
85
5.0
Efficiency
4.0
80
3.0
75
70
VIN = 17V
PLOSS
2.0
65
VIN = 12V
60
1.0
55
VIN = 5V
50
0.0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
IOUT (A)
Efficiency/Power Loss — PSAVE
VOUT = 1.5V, VIN = 12V
100
0.30
95
3.3V Bias
0.25
90
5V Bias
85
80
75
70
65
3.3V minus 5V
60
0.20
0.15
0.10
0.05
0.00
-0.05
55
-0.10
50
-0.15
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
IOUT (A)
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