Fixed 1.8V rail for sensor and logic supplies
The BD18GC0WEFJ-E2: The BD18GC0WEFJ- is a fixed-output 1.8V LDO regulator from ROHM, rated for 1A continuous output. It sits in the 8-HTSOP-J package, which pulls heat through the pad into the board copper — a detail that matters when you're laying out the thermal vias under the part.
Dropout and headroom at 1A
Maximum dropout is 0.92V at 1A load. That means the input rail needs at least 2.72V to hold regulation at full current — a 3.3V rail works fine, but a 2.5V rail won't cut it. Quiescent current is 0.6 mA typical, supply current max 900 µA, so the regulator's own draw won't eat into your load budget.
Active production, ROHS3, and sourcing
Status is Active, ROHS3 compliant.
Thermal and protection features
Built-in protection includes over-current, over-temperature, and soft-start. The enable pin lets you sequence the rail or shut it down in standby. Operating temperature range is -25°C to 85°C, covering most indoor and outdoor equipment without needing a wider-range military-grade part.