參數(shù)資料
型號： MAX5909EEE+
廠商： Maxim Integrated
文件頁數(shù)： 16/24頁
文件大小： 633K
描述： IC HOT-SWAP CTRLR DUAL 16QSOP
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 100
類型： 熱交換控制器
應(yīng)用： 通用型，PCI Express?
內(nèi)部開關(guān)： 無
電源電壓： 1 V ~ 13.2 V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 16-SSOP（0.154"，3.90mm 寬）
供應(yīng)商設(shè)備封裝： 16-QSOP
包裝： 管件
Output Voltage Monitor
The MAX5905MAX5909 monitor the output voltages
with the MON1 and MON2 window comparator inputs.
These voltage monitors are enabled after the startup
period. Once enabled, the voltage monitor detects a
fault if V
MON
_ is less than 543mV or greater than
687mV. If an output voltage fault is detected PGOOD
pulls low. When the MAX5906/MAX5907 detect an out-
put voltage fault on either MON1 or MON2, the fault is
latched and both external MOSFET gates are dis-
charged at 3mA. When the MAX5908/MAX5909 detect
an output voltage fault the external MOSFET gates are
not affected. The MAX5908/MAX5909 PGOOD goes
high impedance when the output voltage fault is
removed. The voltage monitors do not react to output
glitches of less than 20祍. A capacitor from MON_ to
GND increases the effective glitch filter time. Connect
MON1 to IN1 and MON2 to IN2 to disable the output
voltage monitors.
Status Output (PGOOD)
The status output is an open-drain output that pulls low
in response to one of the following conditions:
" Forced off (ON < 0.8V)
" Overcurrent fault
" Output voltage fault
PGOOD goes high impedance 0.75ms after the device
enters normal operation and no faults are present
(Table 1).
Applications Information
Component Selection
n-Channel MOSFET
Select the external MOSFETs according to the applica-
tions current levels. Table 2 lists some recommended
components. The MOSFETs on-resistance (R
DS(ON)
)
should be chosen low enough to have a minimum volt-
age drop at full load to limit the MOSFET power dissipa-
tion. High R
DS(ON)
causes output ripple if there is a
pulsating load. Determine the device power rating to
accommodate a short-circuit condition on the board at
startup and when the device is in automatic-retry mode
(see the MOSFET Thermal Considerations section).
Using the MAX5905/MAX5907/MAX5909 in latched
mode allows the use of MOSFETs with lower power rat-
ings. A MOSFET typically withstands single-shot pulses
with higher dissipation than the specified package rat-
ing. Table 3 lists some recommended manufacturers
and components.
Sense Resistor
The slow-comparator threshold voltage is set at 25mV
for the MAX5904/MAX5905 and is adjustable from
25mV to 100mV for the MAX5906MAX5909. Select a
sense resistor that causes a drop equal to the slow-
comparator threshold voltage at a current level above
the maximum normal operating current. Typically, set
the overload current at 1.2 to 1.5 times the nominal load
current. The fast-comparator threshold is four times the
slow-comparator threshold in normal operating mode.
Choose the sense resistor power rating to be greater
than (I
OVERLOAD
)
2
x V
SC,TH
.
Slow-Comparator Threshold, R
LIM
The slow-comparator threshold voltage of the
MAX5904/MAX5905 is fixed at 25mV and adjustable
from 25mV to 100mV for the MAX5906MAX5909.
The adjustable slow-comparator threshold of the
MAX5906MAX5909 allows designers to fine-tune the
current-limit threshold for use with standard value
sense resistors. Low slow-comparator thresholds allow
for increased efficiency by reducing the power dissipat-
ed by the sense resistor. Furthermore, the low 25mV
Low-Voltage, Dual Hot-Swap Controllers/Power
Sequencers
16   ______________________________________________________________________________________
Table 1. Status Output Truth Table
DEVICE IN
UVLO DELAY
PERIOD
DEVICE IN
STARTUP
PERIOD
ON
OVERCURRENT
FAULT
OVER/UNDER-
VOLTAGE
FAULT
PART IN RETRY-TIMEOUT
PERIOD OR LATCHED OFF
PGOOD
Yes
X
X
X
X
X
Low
X
Yes
X
X
X
X
Low
X
X
Low
X
X
X
Low
X
X
X
Yes
X
X
Low
X
X
X
X
Yes
X
Low
X
X
X
X
X
Yes
Low
No
No
High
No
No
No
High
im
n
X = Dont care.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX5909EEE+ 功能描述:熱插拔功率分布 13.2V Hot-Swap Controller RoHS:否 制造商:Texas Instruments 產(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
MAX5909EEE+T 功能描述:熱插拔功率分布 13.2V Hot-Swap Controller RoHS:否 制造商:Texas Instruments 產(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
MAX5909EEE-T 功能描述:熱插拔功率分布 RoHS:否 制造商:Texas Instruments 產(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
MAX5909UEE 功能描述:熱插拔功率分布 RoHS:否 制造商:Texas Instruments 產(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
MAX5909UEE+ 功能描述:熱插拔功率分布 13.2V Hot-Swap Controller RoHS:否 制造商:Texas Instruments 產(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
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