ncp3155a ON Semiconductor, ncp3155a Datasheet - Page 8

• Manufacturer Part Number: ncp3155a
• Description: Ncp3155a, Ncp3155b 3 A Synchronous Buck Regulator
• Manufacturer: ON Semiconductor

Input = 12 V
(CH2) Green = V
CH2: 0.5 V/div; CH1: 5.0 V/div
Time Scale: 2.0 ms/div; Figure 46
Figure 21. Current Limit Waveforms (NCP3155B)
3.5
2.5
1.5
0.5
30
25
20
15
10
−40 −25 −10
5
0
3
2
1
0
25 30 35 40 45 50 55 60 65 70 75 80 85
NCP3155A
Figure 23. Low−Side MOSFET R
Figure 25. Derating Curve, 18 V Input
V
OUT
in
T
A
= 10 V − 24 V
, AMBIENT TEMPERATURE (°C)
, CH1 (Yellow) = VSW
5
V
TEMPERATURE (°C)
in
20
= 5.0 V
Temperature
35
V
50
TYPICAL PERFORMANCE CHARACTERISTICS
out
= 5.0 V
65
3.3 V
80
DS(on)
2.5 V
95
vs
1.8 V
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110 125
8
110
100
3.5
2.5
1.5
0.5
3.5
2.5
1.5
0.5
90
80
70
60
50
40
30
20
10
0
3
2
1
0
3
2
1
0
25 30 35 40 45 50 55 60 65 70 75 80 85
25 30 35 40 45 50 55 60 65 70 75 80 85
40
NCP3155A
NCP3155A
Figure 22. High−Side MOSFET R
25
1.0 V < V
Figure 24. Derating Curve, 12 V Input
Figure 26. Derating Curve, 24 V Input
10
T
T
A
A
, AMBIENT TEMPERATURE (°C)
, AMBIENT TEMPERATURE (°C)
out
5
< 1.8 V
TEMPERATURE (°C)
V
in
20
Temperature
= 10 V − 24 V
35
V
in
= 5.0 V
V
50
out
12 V
= 5.0 V
65
V
3.3 V
3.3 V
out
80
2.5 V
DS(on)
= 5.0 V
95
vs
110 125
2.5 V