The FAN1117A and FAN1117A-1.8, -2.5, -2.85, -3.3, and -5 are low dropout three-terminal regulators with 1A output current capability. These devices have been optimized for low voltage where transient response and minimum input voltage are critical. The 2.85V version is designed specifically to be used in Active Terminators for SCSI bus. Current limit is trimmed to ensure specified output current and controlled short-circuit current. On-chip thermal limiting provides protection against any combination of overload and ambient temperatures that would create excessive junction temperatures. Unlike PNP type regulators where up to 10% of the output current is wasted as quiescent current, the quiescent current of the FAN1117A flows into the load, increasing efficiency. The FAN1117A series regulators are available in the industry-standard SOT-223, TO-220, and TO-252 (DPAK) power packages.
The FAN1117A series are 1 A three‑terminal low‑dropout linear regulators offered in SOT‑223, TO‑220 and TO‑252 packages. They provide adjustable or fixed output voltages (1.8 V, 2.5 V, 2.85 V, 3.3 V, 5 V) with low quiescent current and on‑chip thermal limiting.
Typical applications include active SCSI terminators, battery chargers, motherboard clock supplies and post‑regulation for switching supplies. The document lists electrical characteristics, mechanical dimensions, ordering information and safety notices.