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spatular | 6 years ago

I've yet to see a voltage regulator IC with built-in caps. DC-DC modules sure, but author argues that this kind of info (module / ic) should be present in schematics. BTW, some linear regulators can't handle ceramic and low-ESR capacitors at output, and may be better with none if that's the choise.

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rightbyte|6 years ago

I hate to maybe be proving his point by showing that I'm not into the EE field and thinking of a board mounted DCDC-converter as a voltage regulator (which it is but not what you usually call it in english?)

I would still argue that logic IC have alot of internal pull ups. Or that eg. "Reset sequence of digital component is wrong" is a bad whiteboard question.

spatular|6 years ago

I believe that without qualification "linear regulator" could be just anything that regulate voltage. Usually you can easily tell from schematics around it if it's some switching IC, an LDO or a module. And if you have layout or 3d render of the board it'd be almost certain.

Otherwise the person may just ask: "where are caps, or is this thing a module or what?"

sitkack|6 years ago

ICs with multiple power domains have a boot sequence that must be followed or the IC isn't in the proper state. Many interview questions fall into the "assumed assumptions" category. Simply saying, "lets reset to a known good state and modify one variable at time disqualifies many candidates". Because we don't teach science like we should. We should be teaching the scientific method before we teach the three Rs.