100 mA output and the switching frequency trade-off
The LM2660MX/NOPB: The switching frequency is selectable between 5 kHz and 40 kHz; the lower setting reduces quiescent losses at light loads, while 40 kHz pushes switching noise above the audio band and allows smaller external capacitors. The output voltage is ratiometric to the input: -Vin, 2Vin, or Vin/2. This means the output tracks the input rail proportionally, not to a fixed regulation point — useful when the downstream load can tolerate a proportional rail and the priority is simplicity over precision.
The part is fully ROHS3 compliant, meeting the EU RoHS directive without exemptions. Operating temperature range covers -40°C to +85°C junction, which qualifies it for industrial environments — factory-floor sensor boards, motor-drive control logic, and outdoor telecom auxiliary supplies.
Board-fit: SOIC-8 and sourcing posture
The 8-SOIC package (0.154" body width, 3.90 mm) is a widely used footprint that shares land patterns with many generic SOIC-8 devices. No exposed pad — thermal dissipation relies on the leadframe and copper traces. The part is offered in Tape & Reel for production pick-and-place and Cut Tape for prototype or low-volume builds. Availability and current pricing confirmed at RFQ time.