Product category:
Power Supply ICs and Controllers
News Release from: Micrel | Subject: MIC2593
Edited by the Electronicstalk Editorial
Team on 07 June 2004
Dual-slot controller handles PCI hot
plugging
The MIC2593 is the latest addition to the MIC259x family of hot swap power controller ICs, designed to support various PCI hot-plug standards.
The MIC2593 is the latest addition to the MIC259x family of hot swap power controller ICs, designed to support various PCI hot-plug standards Produced in the space-saving 48-pin TQFP package, the MIC2593 is a five-rail/dual-slot power controller that supports all system voltages required by PCI v2.3 and PCI-X 1.0b, including the +3.3V auxiliary voltage
This article was originally published on Electronicstalk on 5 Dec 2000 at 8.00am (UK)
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It supports +12, -12, +3.3, +5.0 and +3.3V auxiliary supplies with overcurrent protection.
An SMBus interface is incorporated to allow for sophisticated power control and fault monitoring/reporting.
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Importantly, this new device integrates all the necessary circuitry for controlling external mosfets for the high-current +5 and +3.3V rails.
For the +12, -12 and +3.3V rails, the MIC2593 also integrates all control circuitry, current sense and power mosfets.
The new controller offers adjustable overcurrent timeout, electronic circuit-breaker fault protection, input undervoltage lockout, output voltage monitoring, and output voltage slew rate control.
Internal overcurrent detection circuits regulate the output current to ensure that inrush current never exceeds the programmed threshold.
This feature improves the performance of a system with highly capacitive loads associated with many PCI adapter cards.
For enhanced system performance monitoring, the specific cause of a fault in any of a slot's five supplies is recorded in internal registers and is accessible via the SMBus interface, offering the system design engineer comprehensive system diagnostic capabilities.
As system reliability is a key attribute in applications such as network servers, the MIC2593 has been designed to address PCI power control applications with the additional flexibility and better parametric performance demanded by network system engineers.
For those high-reliability applications that wish to support the Integrated Platform Management Interface (pursuant to IPMI v1.0), Micrel also offers the MIC2590B, the industry's first five-rail/dual slot power controller with an integral analogue multiplexer and 8bit delta-sigma ADC.
In this device, conversion results for voltage and current for any of a slot's five supply rails is available via the SMBus interface.
The MIC2593 is available now in a 48-pin TQFP package for $6.10 each when purchased in 1000-piece tape and reel OEM quantities.
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