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| 型号： | MAX5946AETX+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 1/23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) |
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 MAX5946s 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癈. 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癈 to +85癈 temperature range.
Applications
Servers
Desktop Mobile Server Platforms
Workstations
Embedded Devices
Features
f PCI Express Compliant
f Hot Swaps 12V, 3.3V, and 3.3V Auxiliary for 2
PCI-E Slots
f Integrated Power MOSFET for Auxiliary Supply
Rails
f Controls dI/dt and dV/dt
f Active Current Limiting Protects Against
Overcurrent/Short-Circuit Conditions
f Programmable Current-Limit Timeout
f PWRGD Signal Outputs with Programmable
Power-On Reset (POR) (160ms Default)
f Latched FAULT Signal Output after Overcurrent
or Overtemperature Fault
f Attention Switch Inputs/Outputs with 4ms
Debounce
f Present-Detect Inputs
f Forced-On Inputs Facilitates Testing
f Thermal Shutdown
f Allows Control through SMBus with an I/O
Expander
Dual PCI Express, Hot-Plug
Controller
________________________________________________________________ Maxim Integrated Products 1
19-3483; Rev 0; 11/04
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxims website at www.maxim-ic.com.
E
VA
L
U
A
TI
O
N
K
IT
A
V
AI
L
AB
L
E
ONB
AUXONB
12SB+
12GB
3.3SB+
3.3SB-
PRES-DETB
1
2
3
4
5
6
7
8
9
27
26
25
24
23
22
21
20
19
THIN QFN
MAX5946
TOP VIEW
12SB-
FONB
ONA
AUXONA
12SA+
12GA
3.3SA+
3.3SA-
PRES-DETA
12SA-
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
PIN-PACKAGE
MAX 4 AETX
-40癈 to +85癈
36 Thin QFN
MAX 4 LETX
-40癈 to +85癈
36 Thin QFN
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.
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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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