NCP1597AMNTWG ONSEMI [ON Semiconductor], NCP1597AMNTWG Datasheet - Page 7

• Manufacturer Part Number: NCP1597AMNTWG
• Description: 1 MHz, 2.0 A Synchronous Buck Regulator
• Manufacturer: ONSEMI [ON Semiconductor]

(V
Upper Trace: L
Middle Trace: Output Ripple Voltage, 20 mV/div
Lower Trace: Inductor Current, 1 A/div
Figure 19. Soft−Start Waveforms for V
(V
Upper Trace: L
Middle Trace: Output Ripple Voltage, 20 mV/div
Lower Trace: Inductor Current, 200 mA/div
(V
Upper Trace: EN Pin Voltage, 2 V/div
Middle Trace: Output Voltage, 1 V/div
Lower Trace: Inductor Current, 100 mA/div
IN
IN
IN
Figure 15. DCM Switching Waveform for
= 5 V, I
Figure 17. DCM Switching Waveform for
= 5 V, I
= 5 V, I
LOAD
LOAD
LOAD
X
X
Pin Switching Waveform, 2 V/div
= 100 mA, L = 3.3 mH, C
Pin Switching Waveform, 2 V/div
= 100 mA, L = 3.3 mH, C
= 100 mA, L = 3.3 mH, C
V
V
OUT
OUT
= 3.3 V
= 1.2 V
OUT
OUT
OUT
= 2 x 22 mF)
OUT
= 2 x 22 mF)
= 2 x 22 mF)
= 3.3 V
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Figure 20. Soft−Start Waveforms for V
(V
Upper Trace: L
Middle Trace: Output Ripple Voltage, 20 mV/div
Lower Trace: Inductor Current, 1 A/div
(V
Upper Trace: EN Pin Voltage, 2 V/div
Middle Trace: Output Voltage, 1 V/div
Lower Trace: Inductor Current, 100 mA/div
(V
Upper Trace: L
Middle Trace: Output Ripple Voltage, 20 mV/div
Lower Trace: Inductor Current, 1 A/div
IN
IN
IN
Figure 16. CCM Switching Waveform for
= 5 V, I
Figure 18. CCM Switching Waveform for
= 5 V, I
= 5 V, I
LOAD
LOAD
LOAD
X
X
Pin Switching Waveform, 2 V/div
= 700 mA, L = 3.3 mH, C
Pin Switching Waveform, 2 V/div
= 400 mA, L = 3.3 mH, C
= 100 mA, L = 3.3 mH, C
V
V
OUT
OUT
= 3.3 V
= 1.2 V
OUT
OUT
OUT
OUT
= 2 x 22 mF)
= 2 x 22 mF)
= 2 x 22 mF)
= 1.2 V