Fixed 3.3V rail, 1A capability, 26.5V input ceiling
The BD33FC0WEFJ-E2: The BD33FC0WEFJ- is a single-output positive LDO from ROHM, delivering a fixed 3.3V at up to 1A continuous. The 26.5V maximum input gives headroom for 24V industrial buses or 12V automotive rails with margin for transients. At full 1A load the dropout will be higher — budget 1.2V or so for worst-case headroom in the supply chain.
Package, thermal path, and board-fit
Housed in an 8-SOIC with exposed pad (8-HTSOP-J), the die is bonded to the paddle for heat transfer to the PCB copper plane. Surface-mount assembly; the tape-and-reel option (TR) suits automated pick-and-place. The cut-tape (CT) variant is available for prototyping or low-volume builds.
Quiescent draw and protection suite
Quiescent current is 0.5 mA typical, rising to 2.5 mA max under full supply draw. For always-on rails in battery-powered equipment, this Iq is moderate — not an ultra-low-power LDO, but acceptable for loads that spend most of their time in active mode. On-chip protection includes over-current limiting and thermal shutdown. The enable pin (active-high) lets a system controller gate the regulator output externally — useful for sequencing multiple rails or shutting down a peripheral in sleep.
Sourced through independent distribution against an RFQ.