Microchip Technology MIC2593-2BTQ

Description
The MIC2593 is a power controller that supports power distribution requirements for Peripheral Component Interconnect hot plug systems compliant with PCI v2.3 and PCI-X 1.0b. It provides complete power control support for two PCI slots, including the 3.3V Aux 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 for fault isolation. The MIC2593 also incorporates an SMBus interface that provides complete status and control of power within each slot.

Features
Supports two completely independent PCI slots:
Compliant to PCI v2.3 and PCI-X 1.0b power control requirements
Provides all major power control functions for two independent PCI-X 2.0 slots
Five voltage supplies supported: 12V, -12V, 5V, 3.3V, and 3.3VAUX
Integrated gate driver circuits, current sense, and power MOSFETs for 3.3VAUX, 12V, and -12V
High-side 5V and 3.3V gate driver circuits for external N-Channel MOSFETS
Overcurrent protection with adjustable timeout eliminates false tripping of circuit breakers
Dual-level, dual-speed overcurrent detection circuitry for quick fault response without nuisance tripping
Slot power control with "Power-is-Good" and Fault status reporting:
Via software over an SMBus interface
Via dedicated hardware input/output lines: Hot Plug Interface (HPI)
Complete thermal isolation between circuitry for Slot A and Slot B
One General Purpose Input (GPI) pin per slot for mechanical switch or plug-in card retention/removal input

Applications
PCI hot plug power distribution
Ideal Applications:
Mid- and High-end Server Applications compliant to PCI v2.3, PCI-X 1.0b, and PCI-X 2.0