SC417/SC427
9
Typical Characteristics (continued)
SC417 vs. SC427 Efficiency/Power Loss PSAVE Mode
External Biased: V5V = 5V, V
OUT
= 1.05V
I
OUT
(A)
0
10
20
30
40
50
60
70
80
90
100
0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0.18 0.20 0.22
-0.005
-0.002
0.001
0.004
0.007
0.010
0.013
0.016
0.019
0.022
0.025
SC427
SC417
Power Loss SC417 SC427
Characteristics in this section are based on using the Detailed Application Circuit on page 7 (SC417/SC427).
SC417 Load Regulation PSAVE Mode
External biased; V5V = 5V, V
OUT
= 1.05V
19V
1.03
1.04
1.05
1.06
1.07
1.08
0
2
4
6
8
10
I
OUT
(A)
Note: Measured V
OUT
= 1.05V plus ?of output ripple voltage
12V
6V
SC427 Efficiency/Power Loss vs. Load PSAVE Mode
External biased: V5V = 5V, V
OUT
= 1.05V
19V
IN
19V
IN
6V
IN
6V
IN
I
OUT
(A)
50
55
60
65
70
75
80
85
90
95
100
0    1    2    3   4    5    6   7    8    9   10
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
2.25
2.50
Power Loss
Efficiency
12V
IN
12V
IN
SC427 Efficiency/Power Loss vs. Load FCM
External biased: V5V = 5V, V
OUT
= 1.05V
19V
IN
I
OUT
A
6V
IN
50
55
60
65
70
75
80
85
90
95
100
0    1    2   3   4    5   6   7   8    9   10
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
2.25
2.50
Efficiency
Power Loss
12V
IN
19V
IN
12V
IN
6VIN
SC427 Efficiency/Power Loss FCM
V
IN
= 12V, V
OUT
= 1.05V
IOUT (A)
50
55
60
65
70
75
80
85
90
95
100
0   1    2   3    4   5   6    7   8    9   10
0.05
0.06
0.07
0.08
0.09
0.10
0.11
0.12
0.13
0.14
0.15
Power Loss: Internal-External Biased
External Bias
Internal Bias
SC427 Load Regulation PSAVE Mode
External biased; V5V = 5V, V
OUT
= 1.05V
12V
I
OUT
(A)
19V
1.03
1.04
1.05
1.06
1.07
1.08
0
2
4
6
8
10
Note: Measured V
OUT
= 1.05V plus ?of output ripple voltage
6V