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TPS57140-Q1: Power management forum

Part Number: TPS57140-Q1
Other Parts Discussed in Thread: LM26420

The following schematic diagram of the lack of EMI filter Cd, how much impact. Are there any acceptance criteria?  

The LM26420 module in the following figure selects a filter inductance of 0.15uH.When should Lf choose 0.1~1uH?