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LMR23630-Q1: Switching Frequency coupling into the voltage input

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Part Number:LMR23630-Q1

Hello TI,

We are using the LMR23630-Q1 for one of our applications. 

A 10n and 33p Capacitor is used to filter GSM frequencies and above. This filtered 12 V signal is connected to the VIN of the LMR23630-Q1. The two 4.7u capacitors at the input were based on the design suggested by TI Workbench. 

I have found various application notes (12)  from TI regarding designing an input filter to reduce conducted EMI. 

However, where do I begin with designing the EMI filter?

How do the GSM frequency filter caps and VIN input capacitors affect the EMI filter performance? 

Any inputs would be greatly appreciated! Thank you


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