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Lower switching frequency and reducing EMI

Category: Hardware
Product Number: LTM4702

I'm using the LTM4702 with 12v input and 5v output and have two questions.

1) I used the values in Table 1, which gives a switching frequency of 1.9 MHz. I would like to lower the switching frequency to 1.7 MHz and I'm looking for design guidance on how much the bypass capacitors need to increase to maintain the same ripple.

2) I would like to reduce the switching spurs from this circuit that I'm observing on the ground of the circuit board. Would series inductance or ferrites on the input or output help with this EMI issue?