It does not appear to be common, or at least, it's not in the spec. Per USB-C spec, chargers only have to supply 3A at various voltages, with 5A used only for the 100W 20V profile.
If you buy a charger advertised to support "PPS" at 65W or so or more, you are more likely to get one that does this, though not all will actually do it.
> When using a standard 5V, 3A (15W) USB-C power adapter with Raspberry Pi 5, by default we must limit downstream USB current to 600mA to ensure that we have sufficient margin to support these workloads.
Therefore 5V/3A can still boot RPi5, but it cannot provide enough power to its USB-A port. Therefore it cannot use something like 12V/2A, since RPi5 doesn't have transformer circuit on its board.
They're not, and it's a very annoying requirement. Even 5V/3A was hard to provide reliably. On the other hand, rock pi supports 12V/2A, which modern chargers will provide without any issue.
Oof, this sucks. I wish they supported the wide variety of Anker/Apple/etc. USB-PD chargers out there that can deliver 100W so I can use my existing power bricks. None of them do 5V5A though, they just created yet another nonstandard piece of "USB-C" equipment and it's going to suck.
25W is easy, but most of them will not do it at 5V. I checked one of my 100W chargers, it'll only do 5A @ 20V. 3A at every other voltage. Looking at many other chargers on Amazon do the same.
Most 65W chargers are 20V/3A. Standard USB cables are built to carry at most 2-3A, and e-marker cable authentication chips are required for 5A, I believe, because people running 100W on a random USB cable is scary.
Chargers that would do 5V/5A probably do PD 20V/5A as well, = 100W. Or it'll be a non-conforming special Pi PSU of sorts.
Unfortunately that's not how USB PD works. In PD Land, 25W means 9V/2.8A. A charger is allowed to offer 5V/5A but at no power level is it mandatory, so even a fully USB PD compliant 100W charger which can do 20V/5A is not guaranteed to power the Pi 5.
I just did a quick review on Amazon of adapters ranging from 30 to 120W. Not a single one claimed to support 5V/5A DC. Only a couple claimed 5V/4.5A and they were expensive. 5V/3A is common in the $15+ category.
All of my USB-C Chargers has 5V/3A only.