The application notes of several boost-converters, e.g. from TI (TPS61070, p.18) or LT (LT3464, p.14), show similar unregulated auxiliary output circuits for doubling or inverting the (regular) regulated output.
The following schematic shows how the invertingg auxiliary amplifier topology is combined with the boost converter. Diodes should be schottkies.
Do these circuits have a specific name? I could not find them in literature about switch-mode-power-supplies, but would like to learn more about it.
As far as I can tell, the auxiliary output is mainly practical for supplying small loads e.g. for operation amplifiers or logic-level-conversion ics.
Are there any noteworthy trapdoors or design considerations when using this auxiliary output for such applications? E.g. can this introduce a negative impact on the boost stage or overall efficiency?