參數(shù)資料
型號： MAX5946
廠商： Maxim Integrated Products, Inc.
英文描述： Dual PCI Express, Hot-Plug Controller
中文描述： 雙通道PCI Express、熱插拔控制器
文件頁數(shù)： 1/23頁
文件大?。?/td> 1019K
代理商： MAX5946
General Description
The MAX5946 dual hot-plug controller is designed for
PCI Express applications. The device provides hot-
plug control for 12V, 3.3V, and 3.3V auxiliary supplies of
two PCI express slots. The MAX5946’s logic inputs/out-
puts allow interfacing directly with the system hot-plug
management controller or through an SMBus with an
external I/O expander. An integrated debounced atten-
tion switch and present-detect signals are included to
simplify system design.
The MAX5946 drives four external n-channel MOSFETs
to control the 12V and 3.3V main outputs. The 3.3V aux-
iliary outputs are controlled through internal 0.3
n-channel MOSFETs. Internal charge pumps provide
gate drive for the 12V outputs while the gate drive of
the 3.3V output is driven by the 12V input supply. The
3.3V auxiliary outputs are completely independent from
the main outputs with their own charge pumps.
At power-up, the MAX5946 keeps all of the external
MOSFETs off until the supplies rise above their respec-
tive undervoltage lockout (UVLO) thresholds. The
device keeps the internal MOSFETs off only until the
auxiliary input supply rises above its UVLO threshold.
Upon a turn-on command, the MAX5946 enhances the
external and internal MOSFETs slowly with a constant
gate current to limit the power-supply inrush current.
The MAX5946 actively limits the current of all outputs at
all times and shuts down if an overcurrent condition
persists for longer than a programmable overcurrent
timeout. Thermal-protection circuitry also shuts down all
outputs if the die temperature exceeds +150
°
C. After an
overcurrent or overtemperature fault condition, the
MAX5946L latches off while the MAX5946A automatical-
ly restarts after a restart time delay. The device is avail-
able in a 36-pin (6mm
×
6mm) thin QFN package and
operates over the -40
°
C to +85
°
C temperature range.
Applications
Servers
Desktop Mobile Server Platforms
Workstations
Embedded Devices
Features
PCI Express Compliant
Hot Swaps 12V, 3.3V, and 3.3V Auxiliary for 2
PCI-E Slots
Integrated Power MOSFET 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
Forced-On Inputs Facilitates Testing
Thermal Shutdown
Allows Control through SMBus with an I/O
Expander
M
Dual PCI Express, Hot-Plug
Controller
________________________________________________________________
Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
19-3483; Rev 0; 11/04
EVALUATION KIT
AVAILABLE
ONB
AUXONB
12SB+
12SB-
12GB
3.3SB+
3.3SB-
PRES-DETB
FONB
1
2
3
4
5
6
7
8
9
27
26
25
24
23
22
21
20
19
3
3
P
3
3
P
F
3
P
G
1
I
O
O
I
T
P
THIN QFN
MAX5946
TOP VIEW
F
ONA
AUXONA
12SA+
12SA-
12GA
3.3SA+
3.3SA-
PRES-DETA
FONA
36
35 34 33 32
31 30 29
28
10
11 12 13 14 15 16 17
18
Pin Configuration
Ordering Information
PART
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
36 Thin QFN
36 Thin QFN
MAX5946AETX
MAX5946LETX
Typical Application Circuit appears at end of data sheet.
SMBus is a trademark of Intel Corp.
PCI Express is a trademark of PCI-SIG Corp.
相關PDF資料
PDF描述
MAX5946AETX Dual PCI Express, Hot-Plug Controller
MAX5946LETX Dual PCI Express, Hot-Plug Controller
MAX6002EUR IC-SM-2.5V VOLTAGE REFERENCE
MAX6004EUR IC-SM-4.096V VOLTAGE REFERENCE
MAX6023EBK30-T Analog IC
相關代理商/技術參數(shù)
參數(shù)描述
MAX5946AETJ 制造商:Maxim Integrated Products 功能描述:DUAL PCI-EXPRESS HOT-PLUG CONTROLLER - Rail/Tube
MAX5946AETX 功能描述:熱插拔功率分布 RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
MAX5946AETX+ 功能描述:熱插拔功率分布 Dual PCIe Hot-Plug Controller RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
MAX5946AETX+T 功能描述:熱插拔功率分布 Dual PCIe Hot-Plug Controller RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
MAX5946AETX-T 功能描述:熱插拔功率分布 RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
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