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BQ24297: VSYS fixed at 3,3V

Part Number: BQ24297

Hi all.

We need to have in a system VSYS fixed at 3,3V, the battery is a lipo.

A solution is to use the internal boost converter and after a buck converter to have the 3,3V but in this case we lose about 10% of energy in the BQ24297 boost and 10% in the buck converter.

Another solution is not to use the internal boost and in VSYS we have the battery voltage, in this case we have to use a Buck-boost converter to have 3,3V at out.

Are these two solutions correct? Can we have other solutions?

Many Thanks.