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參數資料
| 型號： | MAX5954LETX+T |
| 廠商： | Maxim Integrated |
| 文件頁數： | 1/22頁 |
| 文件大?。?/td> | 1027K |
| 描述： | IC PCI EXP/HOT-PLUG CTRLR 36TQFN |
| 產品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 2,500 |
| 類型： | 熱交換控制器 |
| 應用： | 通用型，PCI Express? |
| 內部開關： | 無 |
| 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： | 36-WFQFN 裸露焊盤 |
| 供應商設備封裝： | 36-TQFN 裸露焊盤（6x6） |
| 包裝： | 帶卷 (TR) |
General Description
The MAX5954 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 a sin-
gle PCI Express (PCI-E) slot. The MAX5954s logic
inputs/outputs allow interfacing directly with the system
hot-plug management controller or through an SMBus"
with an external I/O expander. Integrated debounced
attention switch and present-detect signals are included
to simplify system design.
The MAX5954 drives two external n-channel MOSFETs
to control the 12V and 3.3V main outputs. The 3.3V aux-
iliary output is controlled through an internal 0.3&
n-channel MOSFET. An internal charge pump provides
gate drive for the 12V output while the gate drive of the
3.3V output is driven by the 12V input supply. The 3.3V
auxiliary output is completely independent from the
main outputs with its own charge pump.
At power-up, the MAX5954 keeps all of the external
MOSFETs off until the supplies rise above their respec-
tive undervoltage-lockout (UVLO) thresholds. The
device keeps the internal MOSFET off only until the aux-
iliary input supply rises above its UVLO threshold. Upon
a turn-on command, the MAX5954 enhances the exter-
nal and internal MOSFETs slowly with a constant gate
current to limit the power-supply inrush current. The
MAX5954 actively limits the current of all outputs at all
times and shuts down if an overcurrent condition per-
sists for longer than a programmable overcurrent time-
out. Thermal-protection circuitry also shuts down all
outputs if the die temperature exceeds +150癈. After an
overcurrent or overtemperature fault condition, the
MAX5954L latches off while the MAX5954A 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 a
Single PCI-E Slot
f Integrated Power MOSFET for Auxiliary Supply
Rail
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 Output with Programmable
Power-On Reset (POR) (160ms Default)
f Latched FAULT Signal Output after Overcurrent
or Overtemperature Fault
f Attention Switch Input/Output with 4.4ms
Debounce
f Present-Detect Input
f Forced-On Input Facilitates Testing
f Thermal Shutdown
f Allows Control through SMBus with an I/O
Expander
Single PCI Express, Hot-Plug
Controller
________________________________________________________________ Maxim Integrated Products 1
19-3914; Rev 1; 1/06
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
N.C.
N.C.
3.3VAUXIN
PWRGD
FAULT
3.3G
N.C.
28
29
30
31
32
33
34
35
36
18
17
16
15
14
13
12
11
10
THIN QFN
MAX5954
TOP VIEW
+
3.3VAUXO
N.C.
N.C.
OUTPUT
INPUT
GND
PGND
PORADJ
TIM
12VIN
N.C.
27 26 25 24 23 22
21 20 19
1 2 3 4 5 6 7 8 9
Pin Configuration
Ordering Information
PART
TEMP RAN E
PIN-
PACKAGE
PKG
CODE
MAX
4AETX+ -40癈 to +85癈
36 Thin QFN
T
-
MAX
4LETX+ -40癈 to +85癈
36 Thin QFN
T
-
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.
+Denotes lead free package.
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相關代理商/技術參數 |
參數描述 |
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| MAX5954LEVCMAXQUSB | 功能描述:電源管理IC開發工具 MAX5954LMAXQUSB EVAL KIT RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| MAX5954LEVKIT | 功能描述:電源管理IC開發工具 Evaluation Kit/Evaluation System for the MAX5954L/MAX5954A RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| MAX5955AEEE | 功能描述:熱插拔功率分布 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 |
| MAX5955AEEE+ | 功能描述:熱插拔功率分布 Dual 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 |
| MAX5955AEEE+T | 功能描述:熱插拔功率分布 Dual 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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