This document discusses the power and Mini Card solutions for PCI Express (PCIe) and PCI Express Mini Card. PCIe is the third generation of PCI technology used to connect I/O peripheral devices in computer systems. It is suitable for various computing platforms such as desktop, mobile, server, and communications. The document also specifies the power requirements for PCIe and PCIe Mini Card.
This document provides design notes for implementing PCI Express and PCI Express Mini Card power requirements. It details the electrical specifications for x1, x4/x8, and x16 connectors, including supply current and capacitive load limits for 12V, 3.3V, and auxiliary rails.
The text presents three specific circuit solutions utilizing Linear Technology hot swap controllers (LTC1647, LTC4210, and LTC1645). These circuits address port power gating, current-limited circuit breakers for optional auxiliary rails, and Mini Card hot swap control with undervoltage and overcurrent monitoring.
| PCI Express x16 Connector 12V Supply Current (Max) | Up to 5.5A |
|---|---|
| PCI Express x16 Connector Capacitive Load (12V) | 2000pF |
| PCI Express Mini Card Primary 3.3V Peak Supply Current | 1A |
| PCI Express Mini Card Auxiliary 3.3V Peak Supply Current (Primary) | 0.33A |
No, there is no requirement for supply sequencing; the supplies may come up or go down in any order.
The unaffected rail also shuts down due to cross-coupled FAULT outputs with the ON pins.