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参数资料
型号： MAX5954LETX+T
厂商： Maxim Integrated
文件页数： 15/22页
文件大小： 1027K
描述： IC PCI EXP/HOT-PLUG CTRLR 36TQFN
产品培训模块： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装： 2,500
类型： 热交换控制器
应用： 通用型，PCI Express?
内部开关： 无
电源电压： 3.3V，12V
工作温度： -40°C ~ 85°C
安装类型： 表面贴装
封装/外壳： 36-WFQFN 裸露焊盘
供应商设备封装： 36-TQFN 裸露焊盘（6x6）
包装： 带卷 (TR)
(t
FAULT
). R
TIM
externally connected from TIM to GND
sets the duration of t
FAULT
.
12V and 3.3V Outputs Normal Operation
The MAX5954 monitors and actively limits the current of
the 12V and 3.3V outputs after the startup period. Each
output has its own overcurrent threshold. If any of the
monitored output currents rise above the overcurrent
threshold for a period t
FAULT
, FAULT asserts and the
controller disengages both the 12V and 3.3V outputs
(see the Fault Management section).
3.3V Auxiliary Output Normal Operation
The auxiliary output current is internally monitored and
actively limited to the maximum current-limit value. An
overcurrent fault condition occurs when the
output current exceeds the overcurrent threshold
for longer than t
FAULT
. A fault on an auxiliary channel
causes all supplies to be disabled after a programmable
time period t
FAULT
(see the Fault Management section).
Power-Good (
PPWWRRGGDD
)
Power-good (PWRGD) is an open-drain output that
pulls low a time (t
POR_HL
) after all of the outputs are
fully on. All outputs are considered fully on when 3.3G
has risen to V
PGTH3.3
, 12G has risen to V
PGTH12
, and
V
3.3AUXO
is less than V
PGTH3.3AUX
. t
POR_HL
is
adjustable from 2.5ms to 1.5s by connecting a resistor
from PORADJ to GND. See the Setting the Power-On-
Reset Timeout Period (t
POR
) section.
Single PCI Express, Hot-Plug
Controller
______________________________________________________________________________________   15
Table 1. Power Requirements for PCI Express Connectors
POWER RAIL
X1 CONNECTOR
X4/8 CONNECTOR
X16 CONNECTOR
3.3V
Voltage Tolerance
?% (max)
?% (max)
?% (max)
Supply Current
3.0A (max)
3.0A (max)
3.0A (max)
Capacitive Load
1000礔 (max)
1000礔 (max)
1000礔 (max)
12V
Voltage Tolerance
?% (max)
?% (max)
?% (max)
Supply Current
0.5A (max)
2.1A (max)
5.5A (max)
Capacitive Load
300礔 (max)
1000礔 (max)
2000礔 (max)
3.3V AUXILIARY
Voltage Tolerance
?% (max)
?% (max)
?% (max)
S up p
l y C ur r ent, W ake E nab l ed
375mA (max)
375mA (max)
375mA (max)
l
rr  n  N  n-W  k  En   l
20mA (max)
20mA (max)
20mA (max)
Capacitive Load
150礔 (max)
150礔 (max)
150礔 (max)
Table 2. Control Logic Truth Table
ON
AUXON
FON
PRES-DET
12V AND 3.3V
OUTPUTS
3.3VAUXO
AUXILIARY
OUTPUT
X
X
Low
X
On
On
X
X
High
High
Off
Off
Low
Low
High
Low*
Off
Off
High
Low
High
Low*
On
Off
Low
High
High
Low*
Off
On
Hi  h
Hi  h
Hi  h
Low*
On
On
*PRES-DET high-to-low transition has a 5ms delay (t
DEG
).
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MAX5955AEEE+ 功能描述:热插拔功率分布 Dual Hot-Swap Controller RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube
MAX5955AEEE+T 功能描述:热插拔功率分布 Dual Hot-Swap Controller RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube
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