The MIC2593 is a power controller supporting power distribution requirements for Peripheral Component Interconnect hot plug systems compliant to PCI v2.3 and PCI-X 1.0b. The MIC2593 provides complete power control support for two PCI slots, including the 3.3VAUX defined by the PCI v2.3 specification. Support for +5V, +3.3V, +12V, and 12V supplies is provided and includes programmable current limit, voltage supervision, fault reporting, and circuit breaker functions which provide fault isolation. The MIC2593 also incorporates an SMBus interface that provides complete status and control of power within each slot.