DC2355A PCB Layout

Question

For what reason is the ground plane of the LTC3130 disconnected from the input- and output-capacitors ground plane on the top layer? (see Picture)

ADIApproved · Accepted Answer

Hi Severin, 
 Based on my understanding, it is to separate the power ground plane from the signal ground plane. 
 You may read these app notes for additional reference: 
 AN136 - PCB Layout Considerations for Non-Isolated Switching Power Supplies (analog.com) 
 AN139 - Power Supply Layout and EMI (analog.com))

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DC2355A PCB Layout