Active production — BOM-fit note
The BD3539NUX-TR: Its single adjustable output (2.7V–5.5V input range) targets DDR SDRAM termination and converter applications, making it a direct fit for memory power rails on DDR2 through DDR4 designs that need a local linear regulator.
Package and thermal pad — board integration
Housed in an 8-UFDFN exposed pad (VSON008X2030), the package measures roughly 2.0 × 3.0 mm with a central thermal pad that must be soldered to a copper land on the PCB for rated power dissipation.
ROHS3 compliant per the manufacturer's declaration — no exemptions or transition-period materials in the bill.