MIC2341 Datasheet, PDF (1/32 Pages) Micrel Semiconductor – Dual-Slot PCI Express Hot-Plug Controller

MIC2341/2341R
Dual-Slot PCI Express Hot-Plug
Controller
General Description
The MIC2341 is a dual-slot power controller supporting the
power distribution requirements for Peripheral Component
Interconnect Express (PCI Express) Hot-Plug compliant
systems. The MIC2341 provides complete power control
support for two PCI Express slots, including the 3.3VAUX
defined by the PCI Express standards. Support for the
12V, 3.3V, and 3.3VAUX supplies includes programmable
gate voltage slew-rate control, voltage supervision,
programmable current limit, and circuit breaker functions.
These features provide comprehensive system protection
and fault isolation.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Features
• Supports two independent PCI Express slots
• 12V, 3.3V, and 3.3VAUX supplies supported per
PCI Express Specification v1.0a, v.2.0
• Integrated Power MOSFETS for 3.3VAUX rails
• Standby Operation for Wake-on-LAN
applications with low backfeed on Main +12V
and +3.3V rails
• Electronic circuit breakers for each supply per slot
- Programmable gate voltage slew-rate control
- Active current regulation controls inrush
current
• High accuracy Primary and Secondary Circuit
Breaker Current-limit Thresholds
• Dual-level, dual-speed fault detection for fast
response without nuisance tripping
• User-programmable Primary Overcurrent Detector
• /PWRGD and Delayed /PWRGD (164 ms) signal
outputs per slot
• Separate /FAULT output signals for MAIN and
AUX rails for each slot
• Global Systems Power-is-Good Output
• Both slots thermally isolated
• Internally Debounced Plug-in Card Retention
Switch Inputs per slot.
Applications
• PCI Express v1.0a, v2.0 hot-plug power control
___________________________________________________________________________________________________________
PCI Express is a registered trademark of the PCI SIG
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
October 2007
M9999-102507-A
[phone]