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For all the homeboys designing discrete power supplies
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T3sl4co1l:
There is actually an IC for that too: https://ww1.microchip.com/downloads/en/DeviceDoc/mic5159.pdf
MIC5156 to 5158 also (wide voltage range), the latter two (7 and 8 ) which have a charge pump to power an N-ch output!
Most of them don't have current limiting (indeed most of the examples in the linked datasheet, don't show current limiting; how do they show a ~constant-power limit curve then..?!).
Family e.g. here: https://www.digikey.com/products/en/integrated-circuits-ics/pmic-voltage-regulators-linear-regulator-controllers/757
A lot are the more specialized type, an N-ch source follower. Compensation is much easier, but to get low dropout, the controller needs a higher supply voltage. It's convenient, when you can get away with it. A good use-case is a system with 12V available, needing a handful of outputs say 1.8-3.3V, supplied from 5V.
Or the lower voltage version, which you might use to get 1.8, 2.5V etc. from a 3.3V common rail, when 5V is handy. Here's an integrated one: https://www.ti.com/lit/ds/symlink/tps74801.pdf
Tim
exe:
There are more: https://www.analog.com/en/parametricsearch/11478#/ ("Discrete Pass Element Linear Regulators (LDO)"). My favourite
LT1575* seems to be designed for Pentium 1 processors (at least my impression from app not 69 https://www.analog.com/media/en/technical-documentation/application-notes/an69f.pdf). It has current limit too.
Micrel parts are, unfortunately, low voltage.
*I never tried it myself as had troubles to find it.
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