MIC2342 MICREL [Micrel Semiconductor], MIC2342 Datasheet

MIC2342

Manufacturer Part Number

MIC2342

Description

Manufacturer

MICREL [Micrel Semiconductor]

Datasheet

1.MIC2342.pdf (32 pages)

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Company:

BOSTOCK HK LIMITED

Part Number:

MIC2342-2YTQ

Manufacturer:

Micrel Inc

Quantity:

10 000

Company:

BOSTOCK HK LIMITED

Part Number:

MIC2342-2YTQ TR

Manufacturer:

Micrel Inc

Quantity:

10 000

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BOSTOCK HK LIMITED

Part Number:

MIC2342R-2YTQ

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Micrel Inc

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10 000

Company:

BOSTOCK HK LIMITED

Part Number:

MIC2342R-2YTQ TR

Manufacturer:

Micrel Inc

Quantity:

10 000

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General Description

The MIC2342 is a dual-slot power controller supporting the

power distribution requirements for Peripheral Component

Interconnect Express (PCI Express

systems. The MIC2342 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.

overcurrent fault on 3.3VAUX that “trips” the circuit breaker

to cause the 3.3VAUX output to shut down, the MAIN

outputs (3.3V and 12V) for the affected 3.3VAUX slot, A or

B, will also be shut down.

provides truly independent output operation for MAIN and

AUX.

Data sheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

June 2008

Additionally, in the event of an

The MIC2341 controller

) Hot-Plug compliant

Features

• Supports two independent PCI Express slots

• MAIN & AUX outputs are inter-dependent during AUX

• 12V, 3.3V, and 3.3VAUX supplies supported per PCI

• Integrated Power MOSFETS for 3.3VAUX rails

• Standby Operation for Wake-on-LAN applications with

• Electronic circuit breakers for each supply per slot

• High accuracy Primary and Secondary Circuit Breaker

• Dual-level, dual-speed fault detection for fast response

• User-programmable Primary Overcurrent Detector

• /PWRGD and Delayed /PWRGD (164 ms) Signal

• Separate /FAULT output signals for MAIN and AUX

• Global Systems Power-is-Good Output

• Both slots thermally isolated

• Internally Debounced Plug-in Card Retention Switch

Applications

• PCI Express v1.0a, v2.0 hot-plug power control

overcurrent conditions

Express Specification v1.0a, v.2.0

low backfeed on Main +12V and +3.3V rails

- Programmable gate voltage slew-rate control

- Active current regulation controls inrush current

Current-limit Thresholds

without nuisance tripping

Outputs per slot

rails for each slot

Inputs per slot.

Dual-Slot PCI Express

MIC2342/2342R

Controller

Hot-Plug

M9999-062008-A

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