USB-C chargers do this all the time. People run notebook computers off of USB-C.
A quick Google search suggests they aren't hard to find:
https://www.walmart.com/ip/Type-C-Such-Phones-Charger-Charge...
A quick Google search suggests they aren't hard to find:
https://www.walmart.com/ip/Type-C-Such-Phones-Charger-Charge...
> Output voltage (four charging modes): PDO DC5.0V-3.0A or 9.0V-2.77A PPS 3.3-5.9V-3A or 3.3-11.0V-2.24A
5V output at 5A is pretty unusual.