The MPM85000 is a low-cost, single-chip device for power management of Media Oriented Systems Transport (MOST) devices. It combines all necessary peripheral functions to implement a MOST network interface such as diagnostics, status monitoring, and power supply. A small 4-mm x 4-mm 24-pin QFN package allows the MPM85000 to be used for all MOST speed grades and physical interfaces whether an electrical physical layer (ePHY) or optical physical layer (oPHY). The internal 3.3-V regulator supplies power to the fiber-optic receiver for the plastic-fiber-based oPHY interfaces. While in sleep-mode, the MPM85000’s current can be reduced to 30 µA. In addition, the monitoring logic detects switch-to-power and wake-up events, and observes temperature and up to three configurable voltage levels. All operational states are reported to the MOST intelligent network interface controller and to an external host controller. The MPM85000 focuses on the MOST-specific power management and does not include specific application power supply functionality. Samples of the MPM85000 are available now. SMSC, Hauppauge, NY. (631) 273-5550.
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