SC417/SC427
8
Typical Characteristics
SC417 Efficiency/Power Loss vs. Load PSAVE Mode
50
55
60
65
70
75
80
85
90
95
100
0   1    2   3    4   5   6    7   8   9   10
I  A
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
2.25
2.50
Internal biased: VLDO = 5V, V
OUT
= 1.05V
Efficiency
Power Loss
19V
IN
12V
IN
6VIN
19V
IN
12VIN
6V
IN
Characteristics in this section are based on using the Detailed Application Circuit on page 7 (SC417/SC427).
SC417 Efficiency/Power Loss PSAVE vs. FCM
External biased: V5V = 5V, V
IN
= 12v, V
OUT
= 1.05V
FCM
50
55
60
65
70
75
80
85
90
95
100
0   1    2   3    4   5   6    7   8    9   10
I
OUT
(A)
-0.025
0.025
0.075
0.125
0.175
0.225
Power Loss FCM -PSM
PSM
Internal biased: VLDO = 5V, V
IN
= 12v, V
OUT
= 1.05V
50
55
60
65
70
75
80
85
90
95
100
0   1    2   3   4    5   6
7
8   9   10
I
OUT
(A)
-0.025
0.025
0.075
0.125
0.175
0.225
PSM
FCM
Power Loss FCM -PSM
SC417 Efficiency/Power Loss vs. Load PSAVE Mode
External biased: V5V = 5V, V
OUT
= 1.05V
50
55
60
65
70
75
80
85
90
95
100
0   1   2   3    4   5   6    7   8   9   10
I
OUT
(A)
0.00
0.50
1.00
1.50
2.00
2.50
Power Loss
Efficiency
6V
IN
12V
IN
19V
IN
19V
IN
12V
IN
6V
IN
SC417 Efficiency/Power Loss vs. Load FCM
SC417 Efficiency/Power Loss FCM
External biased: V5V = 5V, V
OUT
= 1.05V
50
55
60
65
70
75
80
85
90
95
100
0    1   2   3   4   5   6   7   8   9   10
I
OUT
(A)
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
2.25
2.50
12VIN
Efficiency
6V
IN
19V
IN
Power Loss
19V
IN
12V
IN
6V
IN
V
IN
= 12v, V
OUT
= 1.05V
50
55
60
65
70
75
80
85
90
95
100
0   1   2    3    4    5    6   7    8   9   10
I
OUT
(A)
0.04
0.06
0.08
0.10
0.12
0.14
Power Loss FCM -PSM
External Bias
Internal Bias
SC417 Efficiency/Power Loss PSAVE vs. FCM