Monolithic Power Systems (MPS) is a US power-management company based in Kirkland, Washington. It makes high-efficiency DC-DC converters such as the MP1584 and MP2307, along with motor drivers, PMICs and power modules.
MP8670DN 6A, 30V, 420KHz Step-Down Converter with Synchronize able Gate Driver by Monolithic Power Systems (SOP-8 Type): datasheet PDF, pinout and specification
MP1482 2A 18V Synchronous Rectified Step-Down Converter by Monolithic Power Systems (SOP 8 Pin Type): datasheet PDF, pinout and specifications.
MP23070N 3A, 23V, 340KHz Synchronous Rectified Step-Down Converter by Monolithic Power Systems (SOIC 8N Pin Type): datasheet PDF, pinout and specifications.
MP2307 Mini 360 DC to DC Step Down Buck Converter Module by Monolithic Power Systems (SOIC): datasheet PDF, pinout and specifications.