ncp3122 ON Semiconductor, ncp3122 Datasheet - Page 11

• Manufacturer Part Number: ncp3122
• Description: Dual 2.0 A, Step-down Dc/dc Switching Regulator
• Manufacturer: ON Semiconductor

85
80
75
70
65
60
55
50
90
85
80
75
70
65
60
0
0
200 kHz
200 kHz
2200 kHz
Figure 25. NCP3122 Efficiency,
Figure 27. NCP3122 Efficiency,
2200 kHz
1400 kHz
750 kHz
0.5
V
0.5
V
1400 kHz
500 kHz
in
in
750 kHz
500 kHz
= 5 V, V
= 5 V, V
I
I
out
out
out
out
1.0
1.0
(A)
(A)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
= 1.8 V, 255C
= 3.3 V, 255C
TYPICAL OPERATING CHARACTERISTICS
4
5
1.5
1.5
Figure 29. R
6
5 V
5 V
http://onsemi.com
7
NCP3122
2.0
2.0
Vin = AVin (V)
DS(on)
8
11
9
vs. Input Voltage
90
85
80
75
70
65
60
55
50
45
95
90
85
80
75
70
65
60
55
50
10
0
0
200 kHz
200 kHz
11
12
Figure 26. NCP3122 Efficiency,
Figure 28. NCP3122 Efficiency,
2200 kHz
1400 kHz
2200 kHz
750 kHz
1400 kHz
V
750 kHz
500 kHz
0.5
0.5
V
500 kHz
in
13
in
= 12 V, V
= 12 V, V
14
I
I
out
out
out
1.0
out
1.0
(A)
(A)
= 3.3 V, 255C
= 5 V, 255C
1.5
1.5
12 V
12 V
2.0
2.0