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参数资料
| 型号： | MAX5957AETN+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 15/25页 |
| 文件大小： | 634K |
| 描述： | IC TRPL PCI EXP/HOT-PLUG 56-TQFN |
| 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： | 56-WFQFN 裸露焊盘 |
| 供应商设备封装： | 56-TQFN-EP（7x7） |
| 包装： | 带卷 (TR) |
Triple PCI Express, Hot-Plug Controllers
______________________________________________________________________________________ 15
At power-up, the MAX5957/MAX5958 keep all the
external MOSFETs off until all supplies rise above their
respective UVLO thresholds. These devices keep the
internal MOSFETs off only until the 3.3VAUXIN supply
rises above its UVLO threshold. Upon a turn-on com-
mand, the MAX5957/MAX5958 enhance the external
and internal MOSFETs slowly with a constant gate cur-
rent to limit the power-supply inrush current. The
MAX5957/MAX5958 actively limit the current of all out-
puts at all times and shut down the corresponding
channel if an overcurrent condition persists for longer
than a resistor-programmable overcurrent timeout (see
the Fault Management section). Thermal protection cir-
cuitry also shuts down all outputs if the die temperature
exceeds +150癈. After an overcurrent or overtempera-
ture fault condition, the MAX5957/MAX5958 latch off or
automatically restart after a restart time delay.
The power requirement for PCIe connectors is defined
by the PCIe card specification and summarized in
Table 1.
Startup
The main supply outputs can become active only after
all the following events have occurred:
" V
3.3AUXIN
is above its UVLO threshold.
" V
12VIN
and V
3.3SA+
are both above their UVLO
threshold.
" ON_ is driven high.
" PRES-DET_ is low for more than 4ms.
The auxiliary supply output is made available only after
the following events have occurred:
" V
3.3AUXIN
is above its UVLO threshold.
" AUXON_ is driven high.
" PRES-DET_ is low for more than 4ms.
The FON_ input overrides all other control signals and
turns on the respective slot when driven low, as long as
the UVLO thresholds have been reached. Table 2 sum-
marizes the logic conditions required for startup. The aux-
iliary supply input powers the internal control logic and
analog references of the MAX5957/MAX5958, so the main
supplies cannot be enabled, if V
3.3VAUXIN
is not present.
When an output is enabled, a programmable startup
timer (t
SU
) begins to count the startup time duration.
The value of t
SU
is set to 2x the fault timeout period
(t
FAULT
). R
TIM
externally connected from TIM to GND
sets the duration of t
FAULT
.
Table 1. Power Requirement for PCIe Connectors
POWER FAIL
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)
0.5A (max)
0.5A (max)
Capacitive Load
300礔 (max)
1000礔 (max)
2000礔 (max)
3.3V AUXILIARY
Voltage Tolerance
?% (max)
?% (max)
?% (max)
Supply Current, Wake Enabled
375mA (max)
375mA (max)
375mA (max)
Supply Current, Nonwake Enabled
20mA (max)
20mA (max)
20mA (max)
Capacitive Load
150礔 (max)
150礔 (max)
150礔 (max)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5957LETN+ | 功能描述:热插拔功率分布 Triple PCIe Hot Plug 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 |
| MAX5957LETN+T | 功能描述:热插拔功率分布 Triple PCIe Hot Plug 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 |
| MAX5958AETN+ | 功能描述:热插拔功率分布 Triple PCIe Hot Plug 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 |
| MAX5958AETN+T | 功能描述:热插拔功率分布 Triple PCIe Hot Plug 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 |
| MAX5958LETN+ | 功能描述:热插拔功率分布 Triple PCIe Hot Plug 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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