ncp1595 ON Semiconductor, ncp1595 Datasheet - Page 8

• Manufacturer Part Number: ncp1595
• Description: Current Mode Pwm Converter For Low Voltage Outputs
• Manufacturer: ON Semiconductor

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