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I have a design which will include the optional use case of boosting up to 7V from a li-ion battery. I can't seem to find any drivers dedicated to li-ion for this? There seem to be a few buck boost that can generate 3V3. Should I use that 3V3 and boost using a standard boost converter? The Li-ion battery is also going straight into an IC which includes li-ion charge and protection circuitry.

I know this is wasteful use of the battery but will only be used if the user sets the jumper in that position as an additional (but limited) design feature.

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    \$\begingroup\$ Just use a boost converter to take the battery voltage and output 7 volts. \$\endgroup\$ – Andy aka Jul 6 '18 at 11:59
  • \$\begingroup\$ Why not use 2 batteries in series ? The nominal Li-ion voltage is 3.7, that will make you 7.4 without anything else. At full charge, you get 8.4, at low charge you get 6.6V. Should be fine for most applications. \$\endgroup\$ – Overmind Jul 23 '18 at 12:40

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