Rtl9210b Datasheet __link__

Features a built-in switching regulator (5V to 1V) and LDO (5V to 3.3V) Firmware Support:

Integrated power delivery components often result in lower operating temperatures compared to older controllers like the JMS583. rtl9210b datasheet

Being able to reuse an old SATA M.2 or a brand-new NVMe drive in the same enclosure is a massive selling point. Conclusion Features a built-in switching regulator (5V to 1V)

You cannot simply wire this on a breadboard. The RTL9210B datasheet includes a 4-layer stack-up recommendation. Here is the condensed version: rtl9210b datasheet

Section B — Electrical Characteristics & Timing (30 points)