ncp3155a ON Semiconductor, ncp3155a Datasheet - Page 7

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

Input = 12 V, Output = 1.8 V, Load = 2 A,
CH3 (Purple) = V
CH3: 10 V/div; CH2: 1.0 V/div; CH1: 5.0 V/div
Time Scale: 0.5 ms/div; Figure 46
1200
1100
1000
700
900
800
600
500
400
17
16
15
14
13
12
11
10
Figure 19. Startup Waveforms (NCP3155B)
−40 −25 −10
−40 −25 −10
Figure 15. Output Protection vs Temperature
Figure 17. ISET Current vs Temperature
IN
, (CH2) Green = V
Output Undervoltage Threshold
Output Overvoltage Threshold
5
5
TEMPERATURE (°C)
TEMPERATURE (°C)
20
20
35
35
OUT
TYPICAL PERFORMANCE CHARACTERISTICS
50
50
, CH1 (Yellow) = VSW
65
65
80
80
95 110 125
95
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110 125
7
1000
Input = 12 V, Output = 1.8 V, Load = 2 A,
CH3 (Purple) = V
CH3: 10 V/div; CH2: 2.0 V/div; CH1: 5.0 V/div
Time Scale: 1.0 ms/div; Figure 45
Input = 12 V
(CH2) Green = V
CH2: 0.5 V/div; CH1: 5.0 V/div
Time Scale: 2.0 ms/div; Figure 45
950
900
850
800
750
700
650
600
550
500
450
400
Figure 20. Current Limit Waveforms (NCP3155A)
−40 −25 −10
Figure 16. Ramp Valley Voltage vs Temperature
Figure 18. Startup Waveforms (NCP3155A)
OUT
IN
, (CH2) Green = V
5
, CH1 (Yellow) = VSW
TEMPERATURE (°C)
20
35
50
OUT
65
, CH1 (Yellow) = VSW
80
95 110 125