Operating from -19V to -80V with 100V surge protection, a family of highly integrated, hotswap power controllers from Solid State Supplies are designed specifically for telecom, networking, and datacom line card applications. The MIC2589 and MIC2595 controllers/sequencers incorporate the latest available hotswap device technology and are manufactured in 14pin SOIC packages. Designed to control an extemal N-channel MOSFET to provide inrush-current limiting and over-current protection with a minimum of external components, each device provides separate "Power-is-Good" control outputs for multiple DC-DC power converters The output signals are time staggered, a feature that is programmable by an external capacitor. Both devices also offer the ability to detect an output no-load condition for which the no-load timeout delay is also programmable by an external capacitor. Several key parameters including input under-voltage lockout, input over-voltage protection, inrush over-current protection, over-current timeout, open-load detection timeout and "Power-is-Good" sequencing delays are available. The devices also regulate the output current to ensure inrush currents are controlled regardless of the amount of load capacitance. The ability to program any amount of input under-voltage lockout hysteresis (or ON-OFF threshold control) complying with ANSI standards is designer enabled and both models simplify fault management as they incorporate an auto-retry feature that will continue to attempt to restart the load in the event of a fault condition. For existing applications, the MIC2588 is pin-for-pin compatible to the LT1640, the LT1640A and the LT4250. Solid State Supplies PLC, Paddock Woods, Kent TN 12 6BU, UK.
David Patterson, known for his pioneering research that led to RAID, clusters and more, is part of a team at UC Berkeley that recently made its RISC-V processor architecture an open source hardware offering. We talk with Patterson and one of his colleagues behind the effort about the opportunities they see, what new kinds of designs they hope to enable and what it means for today’s commercial processor giants such as Intel, ARM and Imagination Technologies.