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Data Sheet

FULL DATA SHEET (PDF, 640kB) Download   E-Mail

Description

The MAX5957/MAX5958 triple hot-plug controllers are designed for PCI Express (PCIe)® applications. These devices provide hot-plug control for 12V, 3.3V, and 3.3V auxiliary supplies of three PCIe slots. The MAX5957/MAX5958s' logic inputs/outputs allow interfacing directly with the system hot-plug management controller or through an SMBus™ with an external I/O expander such as the MAX7313. An integrated debounced attention switch and present-detect signals simplify system design. The MAX5957/MAX5958 drive six external n-channel MOSFETs to control the 12V and 3.3V main outputs. The 3.3V auxiliary outputs are controlled through 0.2Ω n-channel MOSFETs. Internal charge pumps provide the gate drive for the 12V outputs while the gate drive of the 3.3V output is driven by the 12V input supply clamped to 5.5V above the respective 3.3V main supply rail. The 3.3V auxiliary outputs are completely independent from the main outputs with their own charge pumps. At power-up, the MAX5957/MAX5958 keep all the MOSFETs (internal and external) off until the supplies rise above their respective undervoltage lockout (UVLO) thresholds. Upon a turn-on command, the MAX5957/MAX5958 enhance the external and internal MOSFETs slowly with a constant gate current to limit the power-supply inrush current. The MAX5957/MAX5958 actively limit the current to protect all outputs at all times and shut down if an overcurrent condition occurs. After an overcurrent fault condition, the MAX5957L/MAX5958L latch off while the MAX5957A/MAX5958A automatically restart after a restart time delay. The MAX5957/MAX5958 are offered in latch-off or autorestart versions (see the Selector Guide located in the full data sheet). The MAX5957/MAX5958 are available in a 56-pin TQFN package and operate over the -40°C to +85°C temperature range.

Key Features		Applications/Uses
PCIe Compliant Hot Swap 12V, 3.3V, and 3.3V Auxiliary for 3 PCIe Slots Integrated Power MOSFETs for Auxiliary Supply Rails Controls di/dt and dV/dt Active Current Limiting Protects Against Overcurrent/Short-Circuit Conditions Programmable Current-Limit Timeout Active-Low PWRGD Signal Outputs with Programmable Power-On Reset (POR) (160ms Default) Latched Active-Low FAULT Signal Output After Overcurrent or Overtemperature Fault Attention Switch Inputs/Outputs with 4ms Debounce Present-Detect Inputs Force-On Inputs Facilitate Testing/Debug Thermal Shutdown Allow Control Through SMBus with an I/O Expander		Desktop/Mobile Server Platforms Embedded Devices Servers Workstations

Evaluation Kits

none

Reliability Reports

Show FIT data for: MAX5957 MAX5958 Request Reliability Report for: MAX5957 MAX5958

Software/Models

none

Ordering Information
Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
Devices: 1-8 of 8
MAX5957	Free Sample	Buy	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX5957AETN+			THIN QFN;56 pin;50 mm² Dwg: 21-0144F (PDF) Use pkgcode/variation: T5677+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX5957AETN+T				-40°C to +85°C	See data sheet
MAX5957LETN+			THIN QFN;56 pin;50 mm² Dwg: 21-0144F (PDF) Use pkgcode/variation: T5677+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX5957LETN+T				-40°C to +85°C	See data sheet
MAX5958	Free Sample	Buy	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX5958AETN+			THIN QFN;56 pin;50 mm² Dwg: 21-0144F (PDF) Use pkgcode/variation: T5677+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX5958AETN+T				-40°C to +85°C	See data sheet
MAX5958LETN+			THIN QFN;56 pin;50 mm² Dwg: 21-0144F (PDF) Use pkgcode/variation: T5677+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX5958LETN+T				-40°C to +85°C	See data sheet

More Information

New Product Press Release 2007-10-18

Related Products

MAX5915, MAX5915A, MAX5916, MAX5916A Dual PCI 2.2 Hot-Swap Controllers

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