Methods to reduce the output voltage ripple in MP4470

The MP4470 might work at DCM at light load and no load condition in order to maintain high efficiency, hence the output voltage ripple is high.
Some of the ways to improve the output ripple are:
• Increase the inductance to decrease the current threshold entering DCM. Higher inductance will also help in reducing the output ripple.
• Add more output capacitance to attenuate the output voltage ripple.
But if low output voltage ripple is needed throughout all load conditions, then it is recommended to consider using a forced PWM/CCM part. Operation is forced to continuous conduction mode at light load condition, so the output ripple will be lower.

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