MIC2591B

MIC2591B Dual-Slot PCI Express Hot-Plug Controller www.DataSheet4U.com General Description The MIC2591B is a dual-slot power controller supporting the power distribution requirements for Peripheral Component Interconnect Express (PCI Express) Hot-Plug compliant systems incorporating the Intelligent Platform Management Interface (IPMI) Specification v1.0. The MIC2591B provides complete power control support for two PCI Express slots, including the 3.3VAUX defined by the PCI Express standards. Support for 12V, 3.3V, and 3.3VAUX supplies is provided including programmable constant-current inrush limiting, voltage supervision, programmable current limit, and circuit breaker functions. These features provide comprehensive system protection and fault isolation. The MIC2591B also incorporates an SMBus interface via which complete status of each slot is provided. Data such as voltage and current from each supply of each slot can be obtained for IPMI sensor records in addition to the power status of each slot. All support documentation can be found on Micrel’s web site at www.micrel.com. Features Supports two independent PCI Express slots SMBus interface for slot power control and status Voltage-tolerant I/O for compatibility with SMBus 2.0 systems 12V, 3.3V, and 3.3VAUX supplies supported per PCI Express Specification v1.0a - Intergrated power MOSFETs for 3.3VAUX rails - Standby operation for Wake-on-LAN applications with low backfeed on Main +12V and +3.3V rails. On-chip ci...