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ISL97656 SEPIC for 3Vin to 12Vin to 3.3Vout at 1A application

Posted: 06 May 2009 ?? ?Print Version ?Bookmark and Share

Keywords:SEPIC ISL97656? boost regulator? frequency switching?

There are several applications where one needs to generate a constant output voltage, which is right in the middle of the input voltage range. This circuit can easily be implemented by using any boost regulator, as long as it can handle the input voltage range, and the output load current configured in a SEPIC (single ended primary inductively coupled) configuration.

The ISL97656 is a selectable 640kHz or 1.2MHz constant switching frequency, high efficiency boost regulator for 2.3Vin to 5.5Vin applications. It has an internal 120m, 4A power switch that allows over 90 percent efficiency and has an external compensation pin, which allows ceramic capacitors on the output.

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