NCP1597A
TYPICAL OPERATING CHARACTERISTICS
3.40
100
3.38
3.36
3.34
V OUT = 3.3 V
L = 3.3 m H
C OUT = 2 x 22 m F
90
80
V IN = 4.0 V
V IN = 5.0 V
3.32
3.30
70
60
3.28
V IN = 5.0 V
50
3.26
3.24
3.22
V IN = 4.0 V
40
30
V OUT = 3.3 V
L = 3.3 m H
C OUT = 2 x 22 m F
3.20
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
20
0.01
0.1
1
10
1.90
I OUT , OUTPUT CURRENT (A)
Figure 9. Load Regulation for V OUT = 3.3 V
100
I OUT , OUTPUT CURRENT (A)
Figure 10. Efficiency vs. Output Current for
V OUT = 3.3 V
1.88
1.86
1.84
1.82
1.80
1.78
1.76
1.74
1.72
V OUT = 1.8 V
L = 3.3 m H
C OUT = 2 x 22 m F
V IN = 5.0 V
V IN = 4.0 V
90
80
70
60
50
40
30
V IN = 4.0 V
V IN = 5.0 V
V OUT = 1.8 V
L = 3.3 m H
C OUT = 2 x 22 m F
1.70
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
20
0.01
0.1
1
10
1.30
I OUT , OUTPUT CURRENT (A)
Figure 11. Load Regulation for V OUT = 1.8 V
100
I OUT , OUTPUT CURRENT (A)
Figure 12. Efficiency vs. Output Current for
V OUT = 1.8 V
1.28
1.26
1.24
1.22
V OUT = 1.2 V
L = 3.3 m H
C OUT = 2 x 22 m F
V IN = 5.0 V
90
80
70
V IN = 4.0 V
V IN = 5.0 V
1.20
60
1.18
V IN = 4.0 V
50
1.16
1.14
1.12
1.10
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
40
30
20
0.01
0.1
V OUT = 1.2 V
L = 3.3 m H
C OUT = 2 x 22 m F
1
10
I OUT , OUTPUT CURRENT (A)
Figure 13. Load Regulation for V OUT = 1.2 V
http://onsemi.com
6
I OUT , OUTPUT CURRENT (A)
Figure 14. Efficiency vs. Output Current for
V OUT = 1.2 V
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