ncp1596 ON Semiconductor, ncp1596 Datasheet - Page 8

• Manufacturer Part Number: ncp1596
• Description: 1.5 A, 1.5 Mhz Current Mode Pwm Buck Down Converter
• Manufacturer: ON Semiconductor

(V
Upper Trace: Output Ripple Voltage, 20 mV/div
Middle Trace: L
Lower Trace: Inductor Current Waveform, 500 mA/div
Time Base: 500 ns/div
Figure 21. Soft−Start Waveforms for V
(V
Upper Trace: Output Ripple Voltage, 20 mV/div
Middle Trace: L
Lower Trace: Inductor Current Waveform, 500 mA/div
Time Base: 2 ms/div
(V
Upper Trace: Input Voltage, 1 V/div
Lower Trace: Output Voltage, 1 V/div
Time Base: 500 ms/div
IN
IN
IN
Figure 17. DCM Switching Waveform for
= 5 V, I
Figure 19. DCM Switching Waveform for
= 5 V, I
= 5 V, I
LOAD
LOAD
LOAD
X
X
Pin Switching Waveform, 5 V/div
= 10 mA, L = 3.3 mH, C
= 10 mA, L = 3.3 mH, C
Pin Switching Waveform, 5 V/div
= 10 mA, L = 3.3 mH, C
V
V
OUT
OUT
= 3.3 V
= 1.2 V
OUT
OUT
OUT
= 20 mF)
= 20 mFx2)
= 20 mF)
OUT
= 3.3 V
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Figure 22. Soft−Start Waveforms for V
(V
Upper Trace: Output Ripple Voltage, 20 mV/div
Middle Trace: L
Lower Trace: Inductor Current Waveform, 500 mA/div
Time Base: 200 ns/div
(V
Upper Trace: Output Ripple Voltage, 20 mV/div
Middle Trace: L
Lower Trace: Inductor Current Waveform, 500 mA/div
Time Base: 200 ns/div
(V
Upper Trace: Input Voltage, 1 V/div
Lower Trace: Output Voltage, 500 mV/div
Time Base: 500 ms/div
IN
IN
IN
= 5 V, I
Figure 20. CCM Switching Waveform for
= 5 V, I
= 5 V, I
Figure 18. CCM Switching Waveform for
LOAD
LOAD
LOAD
X
X
Pin Switching Waveform, 5 V/div
= 500 mA, L = 3.3 mH, C
= 500 mA, L = 3.3 mH, C
Pin Switching Waveform, 5 V/div
= 10 mA, L = 3.3 mH, C
V
V
OUT
OUT
= 1.2 V
= 3.3 V
OUT
OUT
OUT
OUT
= 20 mF)
= 20 mFx2)
= 20 mF)
= 1.2 V