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interesting voltage regulator
Oct 20, 2026
Last reply: 38 seconds ago
3 Replies
Amazing! A mere 17 parts and 13 p&p positions to save a 15-cent AP2205!
Cheers
Phil Hobbs
Doesn’t interest me much, sorry. Scarcely a regulator the output voltage is not precise and load current dependent. I am sure we can do better.
I don't see the point anyway. If we're not allowed to use a linear regulator for power consumption reasons, but this circuit is a linear regulator. It says 'ah, but we can save power by turning it off when not in use', then if that's allowed why not just use a linear regulator with an enable pin? Or even just a MOSFET on the front?
There is something funky using the MCU I/O for both voltage sense and control, but I suspect you could do that using an open drain enable pin.
Theo
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