Hello,
(1) Is this operation no problem ?
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Hello,
Hello Ryan san,
Hi Ryuji san,
From your latest post it appears that the customer is supplying the EN pin with a voltage before Vin. This is not the way the device was designed to operate. Ven should be less than or equal to Vin at all times. Please see the page 5 of the datasheet (copied here for convenience).
Very Respectfully,
Ryan