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Penta-Power Sequence Controllerwith Hot swap and System ManagementThe X80010, X80011, X80012, X80013 contain three majorfuncTIons: a power sequencing controller, a hotswapcontroller, and systems management support.The power sequencer controller TIme sequences up to fiveDC/DC modules. The device allows various DC/DC powersequencing configuraTIons, either parallel or relay modes.The power good, enable, and voltage good signals providefor flexible DC/DC TIming configurations. Each voltageenable signal has a built-in delay while additional delay canbe added with simple external passive components.The hot swap controller allows a board to be safely insertedand removed from a live backplane without turning off themain power supply. The X80010 family of devices offers amodular, power distribution approach by providing flexibilityto solve the hotswap and power sequencing issues forinsertion, operations, and extraction. Hardshort Detectionand Retry with Delay, Noise filtering, Insertion OvercurrentBypass, and Gate Current selection are some of theintegrated features of the device. During insertion, the gateof an external power MOSFET is clamped low to suppresscontact bounce. The undervoltage/overvoltage circuits andthe power on reset circuitry suppress the gate turn on untilthe mechanical bounce has ended. The X80010 turns on thegate with a user set slew rate to limit the inrush current andincorporates an electronic circuit breaker set by a senseresistor. After the load is successfully charged, the PWRGDsignal is asserted; indicating that the device is ready topower sequence the DC/DC power bricks.
