3 ms·
I just meant as a replacement for your main input power regulator - for the 7805 way too many people still use. You are absolutely right that there is a role f
by arcticbull 4y ago
I just meant as a replacement for your main input power regulator - for the 7805 way too many people still use.
You are absolutely right that there is a role for LDOs in modern devices.
There's no reason for most hobbyists to be using super hot, super inefficient and super constrained high-dropout linear regulators from 1972 when there's a pin-compatible all-in-one switching module for roughly the same price. To pull more than a couple hundred mA at the lowest voltage differential you need a heatsink!
- sidewndr46 4y agoTrying to use a switching regulator for everything becomes a complete nightmare when you have to debug a circuit. You scope something that should be a square wave or similar and it has the switching frequency of the regulator superimposed upon it everywhere.
- crote 4y agoMost people don't even use input power regulators. 5V wall warts are dirt cheap due to USB charging and provide the exact voltage you need. Why mess around with a 7805 when you already have a dozen 5V power supplies lying around the house?
- arcticbull 4y agoUnless it's a USB power adapter - which is a good choice, btw - I'd be very wary about what's coming out of that 5V no-name wall wart. That power can look like ass and not be close to 5V. If you're doing that an LDO isn't a bad choice.