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Forum Post: RE: TSP5420 Start-up problem low Vin

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The BOOT cap does not really affect that.  What you need a a device with adjustable slow start.  For only 30 mA output yo may be able to get a way with a non adjustable slow start part such as TPS54062 or TPS62120.  Other wise you could try TPS54227 2A w/ adjustable slow start.


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