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參數資料
型號: MAX5960AECS+T
廠商: Maxim Integrated
文件頁數: 22/25頁
文件大小: 632K
描述: IC CTRLR HOT-PLUG QD 80-TQFP
產品培訓模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝: 1,000
類型: 熱交換控制器
應用: 通用型,PCI Express?
內部開關:
電源電壓: 3.3V,12V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 80-TQFP
供應商設備封裝: 80-TQFP(12x12)
包裝: 帶卷 (TR)
Quad PCI Express, Hot-Plug Controllers
22   ______________________________________________________________________________________
Additional External Gate Capacitance
External capacitance can be added from the gate of
the external MOSFETs to GND to slow down the dV/dt
of the 12V and 3.3V outputs. The maximum gate
capacitance load at 12G_ and 3.3G_ must be consis-
tent with the conditions described in the Setting the
Power-On Reset section.
Maximum Load Capacitance
Large capacitive loads at the 12V output, the 3.3V out-
put, and the 3.3V auxiliary output can cause a problem
when inserting discharged PCI cards into live back-
planes. A fault occurs if the time needed to charge the
capacitance of the board is greater than the typical
startup time (2 x t
FAULT
). The MAX5959/MAX5960 with-
stand large capacitive loads due to their adjustable
startup times and adjustable current-limit thresholds.
Calculate the maximum load capacitance as follows:
C
LOAD
< (t
SU
x I
LIM
) / V
OUT
V
OUT
is either the 3.3V output, the 12V output, or the
3.3V auxiliary output for slot A, slot B, slot C, or slot D.
Input Transients
The 12V input (12VIN), the 3.3V input (3.3SA+), and the
3.3V auxiliary (3.3AUXIN) must be above their UVLO
thresholds before startup can occur. Input transients
can cause the input voltage to sag below the UVLO
threshold. The MAX5959/MAX5960 reject transients on
the input supplies that are shorter than 4祍 (typ).
Because some load fault conditions can cause voltage
transients to propagate to the supply inputs with dura-
tion of greater than 4祍, it is recommended that a small
Schottky diode be placed in series with the 12VIN pin
connection, upstream of the 1礔 bypass capacitor. This
provides a hold-up supply that will prevent the 12VIN
input from dropping below V
12UVLO
during severe tran-
sients. See the Typical Application Circuit.
Table 3. Component Manufacturers
COMPONENT
MANUFACTURER
PHONE
WEBSITE
Vishay-Date
402-564-3131
www.vishay.com
Sense Resistor
IRC
704-264-8861
www.irctt.com
Fairchild
888-522-5372
www.fairchildsemi.com
International Rectifier
310-322-3331
www.irf.com
Motorola
602-244-3576
www.mot-sps.com/ppd
MOSFETs
Vishay-Siliconix

www.vishay.com
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MAX5960LECS+T 功能描述:熱插拔功率分布 Triple PCIe Hot Plug Controller RoHS:否 制造商:Texas Instruments 產品: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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MAX5961ETM+ 功能描述:熱插拔功率分布 Quad Hot-Swap Controller RoHS:否 制造商:Texas Instruments 產品: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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