NCP1530_05 Datasheet, PDF(9/16 Page) ON Semiconductor – 600 mA PWM/PFM Step-Down Converter with External Synchronization Pin

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NCP1530_05 Datasheet, PDF (9/16 Pages) ON Semiconductor – 600 mA PWM/PFM Step-Down Converter with External Synchronization Pin

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NCP1530

(VIN = 3.5 V, VOUT = 2.5 V, ILOAD = 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 VOUT = 2.5 V

(VIN = 3.5 V, VOUT = 2.5 V, ILOAD = 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 VOUT = 2.5 V

(VIN = 3.5 V, VOUT = 2.5 V, ILOAD = 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 VOUT = 2.5 V

(VIN = 4.3 V, VOUT = 3.3 V, ILOAD = 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 VOUT = 3.3 V

(VIN = 4.3 V, VOUT = 3.3 V, ILOAD = 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 Output Ripple for VOUT = 3.3 V

(VIN = 4.3 V, VOUT = 3.3 V, ILOAD = 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 Output Ripple for VOUT = 3.3 V

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