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Hello,
I have a question about the input capacitor requirements for the buck regulators of the LM26480. The minimum capacitance is 10uF as given in section 7.7 of the datasheet.
The application circuit in Figure 26 uses 10uF capacitors on VIN1 and VIN2 for the bucks, and the LM26480SQ-AAEV eval board uses these, too.
Other buck regulators we have used, like the LMR33630B, recommend a smaller <1uF cap (100nF or 220nF in this case) for high frequency bypass in addition to a larger bulk capacitance.
Could you please tell us why the LM26480 doesn't require these smaller caps on VIN1, VIN2 or any of the other supply pins?
Thank you very much for your help!
Best regards,
Stan
