NCP1597B_13 Datasheet, PDF (7/13 Pages) ON Semiconductor – 1 MHz, 2 A Synchronous Buck Regulator

NCP1597B
(V_IN = 5 V, I_LOAD = 100 mA, L = 3.3 mH, C_OUT = 2 x 22 mF)
Upper Trace: L_X Pin Switching Waveform, 2 V/div
Middle Trace: Output Ripple Voltage, 20 mV/div
Lower Trace: Inductor Current, 1 A/div
Time Scale: 1.0 ms/div
Figure 15. DCM Switching Waveform for
V_OUT = 3.3 V
(V_IN = 5 V, I_LOAD = 700 mA, L = 3.3 mH, C_OUT = 2 x 22 mF)
Upper Trace: L_X Pin Switching Waveform, 2 V/div
Middle Trace: Output Ripple Voltage, 20 mV/div
Lower Trace: Inductor Current, 1 A/div
Time Scale: 1.0 ms/div
Figure 16. CCM Switching Waveform for
V_OUT = 3.3 V
(V_IN = 5 V, I_LOAD = 100 mA, L = 3.3 mH, C_OUT = 2 x 22 mF)
Upper Trace: L_X Pin Switching Waveform, 2 V/div
Middle Trace: Output Ripple Voltage, 20 mV/div
Lower Trace: Inductor Current, 200 mA/div
Time Scale: 1.0 ms/div
Figure 17. DCM Switching Waveform for
V_OUT = 1.2 V
(V_IN = 5 V, I_LOAD = 400 mA, L = 3.3 mH, C_OUT = 2 x 22 mF)
Upper Trace: L_X Pin Switching Waveform, 2 V/div
Middle Trace: Output Ripple Voltage, 20 mV/div
Lower Trace: Inductor Current, 1 A/div
Time Scale: 1.0 ms/div
Figure 18. CCM Switching Waveform for
V_OUT = 1.2 V
(V_IN = 5 V, I_LOAD = 100 mA, L = 3.3 mH, C_OUT = 2 x 22 mF)
Upper Trace: EN Pin Voltage, 2 V/div
Middle Trace: Output Voltage, 1 V/div
Lower Trace: Inductor Current, 100 mA/div
Time Scale: 500 ms/div
Figure 19. Soft−Start Waveforms for V_OUT = 3.3 V
(V_IN = 5 V, I_LOAD = 100 mA, L = 3.3 mH, C_OUT = 2 x 22 mF)
Upper Trace: EN Pin Voltage, 2 V/div
Middle Trace: Output Voltage, 1 V/div
Lower Trace: Inductor Current, 100 mA/div
Time Scale: 500 ms/div
Figure 20. Soft−Start Waveforms for V_OUT = 1.2 V
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