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参数资料
| 型号： | MAX5946AETX+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 13/23页 |
| 文件大小： | 1102K |
| 描述： | IC CNTRLR PCI EXP DL 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) |
Detailed 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 MAX5946s logic inputs/outputs
allow interfacing directly with the system hot-plug-man-
agement controller or through an SMBus with an exter-
nal I/O expander. An integrated debounced attention
switch and present-detect signals are included to sim-
plify 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 0.24& n-
channel MOSFETs. Internal charge pumps provide a
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 all supplies rise above their respec-
tive UVLO thresholds. The device keeps the internal
MOSFETs off only until the 3.3VAUXIN 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癈. After an overcurrent or
overtemperature fault condition, the MAX5946L latches
off while the MAX5946A automatically restarts after a
restart time delay.
The power requirement for PCI express connectors is
defined by the PCI express card specification and
summarized in Table 1.
Dual PCI Express, Hot-Plug
Controller
______________________________________________________________________________________ 13
PIN
NAME
FUNCTION
19
3.3SB-
Slot B 3.3V Negative Current-Sense Input. See 3.3SA- function.
20
3.3SB+
Slot B 3.3V Positive Current-Sense Input. Connect the positive side of the current-sense resistor to
3.3SB+ using the Kelvin-sensing technique to assure accurate current sensing.
21
12GB
Slot B 12V Gate-Drive Output. See 12GA function.
22
12SB-
Slot B 12V Negative Current-Sense Input. See 12SA- function.
23
12SB+
Slot B 12V Positive Current-Sense Input. See 12SA+ function.
24
AUXONB
Slot B 3.3V Auxiliary Output Enable. See AUXONA function.
25
ONB
Slot B 12V And 3.3V Outputs Enable. See ONA function.
26
FONB
Slot B Forced-On Input. See FONA function.
27
PRES-DETB Slot B Present-Detect Input. See PRES-DETA function.
28
TIM
v r rr n Tim
Pr r mmin In . nn
r i r
w n
& n
k& fr m TIM
ND
to program t
FAULT
. Leave TIM floating for a default timeout of 11ms.
29
INPUT2
Digital Logic Gate Input
30
OUTPUT2
Digital Output. 4ms debounced digital output of INPUT2.
31
OUTPUT1
Digital Output. 4ms debounced digital output of INPUT1.
32
INPUT1
Digital Logic Gate Input
33
12VIN
12V Supply Input. V
12VIN
drives the gates of the MOSFETs connected to 3.3GA and 3.3GB. 12VIN
powers an internal charge pump that drives the gates of the MOSFETs connected to 12GA and 12GB.
34
GND
Ground
35
PGND
Power Ground. Connect externally to GND.
36
PORADJ
Power-On-Reset Programming Input. Connect a resistor between 500& and 500k& from PORADJ to
GND to ro ram the POR timin . Leave floatin for a default value of 160ms.
Pin Description (continued)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5946LETJ | 制造商:Maxim Integrated Products 功能描述:DUAL PCI-EXPRESS HOT-PLUG CONTROLLER - Rail/Tube |
| MAX5946LETX | 功能描述:热插拔功率分布 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 |
| MAX5946LETX+ | 功能描述:热插拔功率分布 Dual 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 |
| MAX5946LETX+T | 功能描述:热插拔功率分布 Dual 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 |
| MAX5946LETX-T | 功能描述:热插拔功率分布 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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