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NCP1500
APPLICATIONS INFORMATION
80
1.77
70
V O = 1.8 V
1.76
60
50
40
30
20
V O = 1.5 V
V O = 1.3 V
V O = 1.0 V
1.75
1.74
1.73
1.72
1.71
1.70
C B0 = Low
C B1 = High
V IN = 3.6 V
10
1.69
0
2.5
2.7
2.9
3.1
3.3
3.5
1.68
0
100
200
300
400
V IN , INPUT VOLTAGE (V)
Figure 8. Efficiency in Linear Mode Operation
vs. Input Voltage (I OUT = 10 mA)
90
85
I OUT , (mA)
Figure 9. Output Voltage vs. Output Current in
LDO Mode
1.8
1.7
V IN = 3.6 V
C IN = 10 m F
C OUT = 10 m F
L = 15 m H
PW Load = 8 msec, 3%
80
75
70
65
60
55
50
45
V OUT = 1.8 V
V IN = 3.6 V
C IN = 10 m H
C OUT = 10 m H
L = 15 m H
V OUT = 1.5 V
0
500
1000
1500
40
0
50
100
150
200
250
300
I OUT , (mA)
Figure 10. Output Voltage vs. Output Current
in PWM Mode
Table 1. Efficiency Measurement in PWM Mode
I OUT , (mA)
Figure 11. PWM Efficiency
V OUT
(V)
1.5
1.8
V IN
(V)
2.5
3.0
3.6
4.2
2.5
3.0
3.6
4.2
1
44%
44%
49%
51%
48%
41%
45%
52%
5
75%
68%
62%
64%
79%
73%
64%
63%
10
82%
76%
71%
66%
86%
80%
76%
71%
20
86%
82%
79%
75%
90%
85%
83%
78%
30
87%
84%
80%
77%
90%
88%
84%
81%
I OUT (mA)
40
88%
85%
83%
80%
91%
88%
86%
83%
60
88%
86%
83%
81%
91%
89%
86%
84%
80
88%
86%
84%
82%
91%
89%
87%
85%
100
90%
86%
84%
82%
91%
89%
87%
85%
200
84%
83%
82%
82%
87%
86%
85%
85%
300
80%
80%
80%
79%
84%
84%
84%
83%
NOTE:
See figure 1 for circuit configuration.
C in = C out = C3216X5R106M
L = D01606T ? 153
http://onsemi.com
10
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