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Boot capacitor regulation in LM25007 constant-on-time converter

Posted: 07 Apr 2011 ?? ?Print Version ?Bookmark and Share

Keywords:step down buck regulator? boot capacitor?

LM25000 series of constant-on-time (COT) integrated regulators provide a way of implementing a step down buck regulator with nearly fixed frequency. Nonsynchronous operation reduces switching frequency at very light load resulting in higher efficiency than a comparable fixed frequency converter. The non-synchronous operation, however, causes two problems related to boot capacitor regulation under certain operating conditions.

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