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General Description

The MAX5959/MAX5960 quad hot-plug controllers are

designed for PCI Express

(PCIe) applications. These

devices provide hot-plug control for the main 12V, 3.3V,

and 3.3V auxiliary supplies of four PCIe slots. The

MAX5959/MAX5960s’ logic inputs/outputs allow interfac-

ing directly with the system hot-plug management con-

troller 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 MAX5959/MAX5960 drive eight external n-channel

MOSFETs to control the 12V and 3.3V main outputs. The

3.3V auxiliary outputs are controlled through 0.2Ω n-chan-

nel 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 aux-

iliary outputs are completely independent from the main

outputs with their own charge pumps.

At power-up, the MAX5959/MAX5960 keep all the

MOSFETs off until the supplies rise above their respective

undervoltage lockout (UVLO) thresholds. Upon a turn-on

command, the MAX5959/MAX5960 enhance the external

and internal MOSFETs slowly with a constant gate current

to limit the power-supply inrush current.

The MAX5959/MAX5960 actively limit the current to pro-

tect all outputs at all times and shut down if an overcur-

rent condition persists longer than the programmable

overcurrent timeout. After an overcurrent or overtempera-

ture fault condition, the MAX5959L/MAX5960L latch off

while the MAX5959A/MAX5960A automatically restart

after a restart time delay. The MAX5959/MAX5960 are

offered in latch-off or autorestart versions (see the

Selector Guide

The MAX5959/MAX5960 are available in an 80-pin TQFP

package and operate over the -40°C to +85°C tempera-

ture range.

Applications

Servers

Desktop Mobile Server Platforms

Workstations

Features

♦ PCIe Compliant

♦ Hot Swap 12V, 3.3V, and 3.3V Auxiliary for 4

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

♦ PWRGD Signal Outputs with Programmable

Power-On Reset (POR) (160ms Default)

♦ Latched 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

MAX5959/MAX5960

Quad PCI Express, Hot-Plug Controllers

________________________________________________________________

Maxim Integrated Products

PART TEMP RANGE

PIN-

PACKAGE

PKG

CODE

MAX5959AECS+ -40°C to +85°C 80 TQFP C80-1

MAX5959LECS+ -40°C to +85°C 80 TQFP C80-1

MAX5960AECS+ -40°C to +85°C 80 TQFP C80-1

MAX5960LECS+ -40°C to +85°C 80 TQFP C80-1

PART LATCH OFF AUTORESTART GUARANTEED AUX CURRENT (mA)

MAX5959AECS+ √ 375

MAX5959LECS+ √ 375

MAX5960AECS+ √ 550

MAX5960LECS+ √ 550

Selector Guide

Ordering Information

19-0856; Rev 0; 7/07

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

Denotes a lead-free package.

Pin Configuration and Typical Application Circuit appear at

end of data sheet.

EVALUATION KIT

AVAILABLE

PCI Express is a registered trademark of PCI-SIG Corp.

SMBus is a trademark of Intel Corp.

1 2 3 4 5 6 ... 24 25

MAX5959/MAX5960 1

Inhaltsverzeichnis

Seite 1 - MAX5959/MAX5960

General DescriptionThe MAX5959/MAX5960 quad hot-plug controllers aredesigned for PCI Express®(PCIe) applications. Thesedevices provide hot-plug contro

Seite 2

MAX5959/MAX5960Quad PCI Express, Hot-Plug Controllers10 ______________________________________________________________________________________Typical

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MAX5959/MAX5960Quad PCI Express, Hot-Plug Controllers______________________________________________________________________________________ 11Pin Desc

Seite 4

MAX5959/MAX5960Quad PCI Express, Hot-Plug Controllers12 ______________________________________________________________________________________Pin Desc

Seite 5

MAX5959/MAX5960Quad PCI Express, Hot-Plug Controllers______________________________________________________________________________________ 13Pin Desc

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MAX5959/MAX5960Quad PCI Express, Hot-Plug Controllers14 ______________________________________________________________________________________Pin Desc

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MAX5959/MAX5960Quad PCI Express, Hot-Plug Controllers______________________________________________________________________________________ 155μA12S_-

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MAX5959/MAX5960Quad PCI Express, Hot-Plug Controllers16 ______________________________________________________________________________________At power

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MAX5959/MAX5960Quad PCI Express, Hot-Plug Controllers______________________________________________________________________________________ 17Table 2.

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MAX5959/MAX5960Quad PCI Express, Hot-Plug Controllers18 ______________________________________________________________________________________12V and

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MAX5959/MAX5960Quad PCI Express, Hot-Plug Controllers______________________________________________________________________________________ 19Debounce

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MAX5959/MAX5960Quad PCI Express, Hot-Plug Controllers2 _______________________________________________________________________________________ABSOLUTE

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MAX5959/MAX5960Quad PCI Express, Hot-Plug Controllers20 ______________________________________________________________________________________ENABLE C

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MAX5959/MAX5960Quad PCI Express, Hot-Plug Controllers______________________________________________________________________________________ 21External

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MAX5959/MAX5960Quad PCI Express, Hot-Plug Controllers22 ______________________________________________________________________________________Addition

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MAX5959/MAX5960Quad PCI Express, Hot-Plug Controllers______________________________________________________________________________________ 23Typical

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MAX5959/MAX5960Quad PCI Express, Hot-Plug Controllers24 ______________________________________________________________________________________Pin Conf

Seite 18

MAX5959/MAX5960Quad PCI Express, Hot-Plug ControllersMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodie

Seite 19

MAX5959/MAX5960Quad PCI Express, Hot-Plug Controllers_______________________________________________________________________________________ 3PARAMETE

Seite 20

MAX5959/MAX5960Quad PCI Express, Hot-Plug Controllers4 _______________________________________________________________________________________ELECTRIC

Seite 21

MAX5959/MAX5960Quad PCI Express, Hot-Plug Controllers_______________________________________________________________________________________512V INPUT

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MAX5959/MAX5960Quad PCI Express, Hot-Plug Controllers6 _______________________________________________________________________________________Typical

Seite 23

MAX5959/MAX5960Quad PCI Express, Hot-Plug Controllers_______________________________________________________________________________________7FAULT CON

Seite 24

MAX5959/MAX5960Quad PCI Express, Hot-Plug Controllers8 _______________________________________________________________________________________Typical

Seite 25

MAX5959/MAX5960Quad PCI Express, Hot-Plug Controllers_______________________________________________________________________________________9Typical O

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