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NCP1550SN33T1

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17
NCP1550
http://onsemi.com
7
Figure 11. Continuous Conduction Mode PWM
Switching Waveform for V
OUT
= 3.3 V
Figure 12. Discontinuous Conduction Mode PWM
Switching Waveform for V
OUT
= 3.3 V
Figure 13. Discontinuous Conduction Mode PFM
Switching Waveform for V
OUT
= 3.3 V
Figure 14. Continuous Conduction Mode PWM
Switching Waveform for V
OUT
= 2.5 V
Upper Trace: Output Voltage Ripple, 50 mV/Division
Middle Trace: Inductor Current, I
L
, 500 mA/Division
Lower Trace: Voltage at Cathode of Schottky Diode, 2.0 V/Division
Upper Trace: Output Voltage Ripple, 50 mV/Division
Middle Trace: Inductor Current, I
L
, 500 mA/Division
Lower Trace: Voltage at Cathode of Schottky Diode, 2.0 V/Divisio
n
Upper Trace: Output Voltage Ripple, 50 mV/Division
Middle Trace: Inductor Current, I
L
, 500 mA/Division
Lower Trace: Voltage at Cathode of Schottky Diode, 2.0 V/Division
Upper Trace: Output Voltage Ripple, 50 mV/Division
Middle Trace: Inductor Current, I
L
, 500 mA/Division
Lower Trace: Voltage at Cathode of Schottky Diode, 2.0 V/Division
(V
IN
= 5.0 V, I
LOAD
= 500 mA, L = 3.3 mH, C
OUT
= 100 mF) (V
IN
= 5.0 V, I
LOAD
= 100 mA, L = 3.3 mH, C
OUT
= 100 mF)
(V
IN
= 5.0 V, I
LOAD
= 10 mA, L = 3.3 mH, C
OUT
= 100 mF) (V
IN
= 5.0 V, I
LOAD
= 500 mA, L = 5.6 mH, C
OUT
= 33 mF)
NCP1550
http://onsemi.com
8
Figure 15. Discontinuous Conduction Mode PWM
Switching Waveform for V
OUT
= 2.5 V
Upper Trace: Output Voltage Ripple, 50 mV/Division
Middle Trace: Inductor Current, I
L
, 500 mA/Division
Lower Trace: Voltage at Cathode of Schottky Diode, 2.0 V/Division
(V
IN
= 5.0 V, I
LOAD
= 100 mA, L = 5.6 mH, C
OUT
= 33 mF)
Figure 16. Discontinuous Conduction Mode PFM
Switching Waveform for V
OUT
= 2.5 V
Upper Trace: Output Voltage Ripple, 50 mV/Division
Middle Trace: Inductor Current, I
L
, 500 mA/Division
Lower Trace: Voltage at Cathode of Schottky Diode, 2.0 V/Division
(V
IN
= 5.0 V, I
LOAD
= 30 mA, L = 5.6 mH, C
OUT
= 33 mF)
Figure 17. Continuous Conduction Mode
PWM Switching Waveform for V
OUT
= 1.8 V
Upper Trace: Output Voltage Ripple, 50 mV/Division
Middle Trace: Inductor Current, I
L
, 500 mA/Division
Lower Trace: Voltage at Cathode of Schottky Diode, 2.0 V/Division
(V
IN
= 5.0 V, I
LOAD
= 500 mA, L = 6.8 mH, C
OUT
= 33 mF)
Figure 18. Discontinuous Conduction Mode
PWM Switching Waveform for V
OUT
= 1.8 V
Upper Trace: Output Voltage Ripple, 50 mV/Division
Middle Trace: Inductor Current, I
L
, 500 mA/Division
Lower Trace: Voltage at Cathode of Schottky Diode, 2.0 V/Division
(V
IN
= 5.0 V, I
LOAD
= 60 mA, L = 6.8 mH, C
OUT
= 33 mF)
NCP1550
http://onsemi.com
9
Figure 19. Discontinuous Conduction Mode
PFM Switching Waveform for V
OUT
= 1.8 V
(V
IN
= 5.0 V, I
LOAD
= 30 mA, L = 6.8 mH, C
OUT
= 33 mF)
Figure 20. Startup Transient Response for
V
OUT
= 3.3 V
Upper Trace: Output Voltage Ripple, 50 mV/Division
Middle Trace: Inductor Current, I
L
, 500 mA/Division
Lower Trace: Voltage at Cathode of Schottky Diode, 2.0 V/Division
Upper Trace: Input Voltage, 2.0 V/Division
Lower Trace: Output Voltage, 2.0 V/Division
Figure 21. Startup Transient Response for
V
OUT
= 1.8 V
Upper Trace: Input Voltage, 2.0 V/Division
Lower Trace: Output Voltage, 1.0 V/Division
Figure 22. Chip Enable/Disable Output Voltage
Waveform
Upper Trace: Output Voltage Waveform, 2.0 V/Division
Lower Trace: Chip Enable/Disable Pin Waveform, 0.5 V/Division
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17

NCP1550SN33T1

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Buy NCP1550SN33T1
Manufacturer:
ON Semiconductor
Description:
IC REG CTRLR BUCK 5TSOP
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