NCP1530
http://onsemi.com
9
(V
IN
= 3.5 V, V
OUT
= 2.5 V, I
LOAD
= 10 mA)
Upper Trace: Output Voltage Ripple, 50 mVac/Div.
Lower Trace: LX Pin Switching Waveform, 2.0 V/Div.
Figure 27. PFM Switching Waveform and
Output Ripple for V
OUT
= 2.5 V
(V
IN
= 3.5 V, V
OUT
= 2.5 V, I
LOAD
= 80 mA)
Upper Trace: Output Voltage Ripple, 50 mVac/Div.
Lower Trace: LX Pin Switching Waveform, 2.0 V/Div.
Figure 28. DCM PWM Switching Waveform
and Output Ripple for V
OUT
= 2.5 V
(V
IN
= 3.5 V, V
OUT
= 2.5 V, I
LOAD
= 600 mA)
Upper Trace: Output Voltage Ripple, 50 mVac/Div.
Lower Trace: LX Pin Switching Waveform, 2.0 V/Div.
Figure 29. CCM PWM Switching Waveform
and Output Ripple for V
OUT
= 2.5 V
(V
IN
= 4.3 V, V
OUT
= 3.3 V, I
LOAD
= 10 mA)
Upper Trace: Output Voltage Ripple, 50 mVac/Div.
Lower Trace: LX Pin Switching Waveform, 2.0 V/Div.
Figure 30. PFM Switching Waveform and
Output Ripple for V
OUT
= 3.3 V
(V
IN
= 4.3 V, V
OUT
= 3.3 V, I
LOAD
= 50 mA)
Upper Trace: Output Voltage Ripple, 50 mVac/Div.
Lower Trace: LX Pin Switching Waveform, 2.0 V/Div.
Figure 31. DCM PWM Switching Waveform
and Out
ut Ri
le for V
= 3.3 V
(V
IN
= 4.3 V, V
OUT
= 3.3 V, I
LOAD
= 600 mA)
Upper Trace: Output Voltage Ripple, 50 mVac/Div.
Lower Trace: LX Pin Switching Waveform, 2.0 V/Div.
Figure 32. CCM PWM Switching Waveform
and Out
ut Ri
le for V
= 3.3 V