I think you just described the 7805? https://www.tutorialspoint.com/what-is-voltage-regulator-7805-internal-block-diagram-and-applications https://www.tutorial

I think you just described the 7805? https://www.tutorialspoint.com/what-is-voltage-regulator-7805-internal-block-diagram-and-applications https://www.tutorialspoint.com/what-is-voltage-regulator-780... It's a great old school design, but there are somewhat newer capless designs that are about 2 drops like the LM2940. There are a lot of other designs between a 0.2V current feedback pFET design, but not all of them have been so popular that their costs are close to packaging.