參數(shù)資料
型號： MAX8555
廠商： Maxim Integrated Products, Inc.
英文描述： Low-Cost. High-Reliability. 0.5V to 3.3V ORing MOSFET Controllers
中文描述： 低成本、高可靠性、0.5V至3.3V “或”邏輯MOSFET控制器
文件頁數(shù)： 1/17頁
文件大?。?/td> 426K
代理商： MAX8555
General Description
Critical loads often employ parallel-connected power
supplies with redundancy to enhance system reliability.
The MAX8555/MAX8555A are highly integrated, inex-
pensive MOSFET controllers that provide isolation and
redundant power capability in high-reliability systems.
The MAX8555/MAX8555A are used in 0.5V to 3.3V sys-
tems, and have an internal charge pump to drive the
gates of the N-channel pass elements to (V
CS+
+ 5V).
During startup, the MAX8555/MAX8555A monitor the
voltage drop across the external MOSFETs. Once V
CS+
approaches or exceeds the bus voltage (V
CS-
), the
MOSFETs are turned on. The MAX8555/MAX8555A fea-
ture a dual-purpose TIMER input. A single external
resistor from TIMER to ground sets the turn-on speed of
the external MOSFETs. Optionally, the TIMER input can
be used as a logic enable input. Once the external
MOSFET is turned on, these controllers monitor the
load, protecting the bus against overvoltage, undervolt-
age, and reverse-current fault conditions. The
MAX8555 is available with a 40mV reverse-current
threshold, while the MAX8555A is available with a 20mV
reverse-current threshold.
Overvoltage and undervoltage fault thresholds are
adjustable and can be disabled. The current-limit trip
points are set by the external MOSFETs’ R
DS(ON)
,
reducing component count. An open-drain, logic-low
fault output indicates if an overvoltage, undervoltage, or
reverse-current fault occurs. The MAX8555 and the
MAX8555A can shut down in response to a reverse-
current fault condition as quickly as 200ns.
Both devices come in space-saving 10-pin μMAX or
TDFN packages and are specified over the extended
-40
°
C to +85°C temperature range.
Applications
Point-of-Load Supplies
Power-Supply Modules
Servers
Telecom Power Supplies
Rectifiers
Redundant Power Supplies in High-Availability
Systems
Features
Simple, Integrated, and Inexpensive MOSFET
Controllers
ORing FET Drive for 0.5V to 3.3V
Eliminate ORing Diode Power Dissipation
Provide N+1 Redundant Supply Capability for
Highly Reliable Systems
Isolate Failed Short-Circuit Supply from
Output BUS
Respond to Reverse Short-Circuit Current
in 200ns
Adjustable Blank Time
Programmable Soft-Start
Logic Enable Input
Adjustable Overvoltage and Undervoltage
Trip Points
Fault-Indicator Output
Space-Saving Packages
M
Low-Cost, High-Reliability, 0.5V to 3.3V ORing
MOSFET Controllers
________________________________________________________________
Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
Ordering Information
13-3087; Rev 0; 1/04
EVALUATION KIT
AVAILABLE
PART
TEMP
RANGE
PIN-
PACKAGE
TOP
MARK
MAX8555
ETB
-40
°
C to 85
°
C
10 TDFN
3mm x 3mm*
ACC
MAX8555EUB
-40
°
C to 85
°
C
10 μMAX
8555EUB
MAX8555A
ETB
-40
°
C to 85
°
C
10 TDFN
3mm x 3mm*
ADD
MAX8555AEUB
-40
°
C to 85
°
C
10 μMAX
8555AEUB
1
2
3
4
5
10
9
8
7
6
CS+
CS-
OVP
V
DD
VL
GND
GATE
MAX8555/
MAX8555A
μ
MAX
TOP VIEW
TIMER
UVP
FAULT
1
2
3
4
5
10
9
8
7
6
CS+
CS-
OVP
V
DD
VL
GND
GATE
MAX8555/
MAX8555A
TDFN
TIMER
UVP
FAULT
Pin Configurations
*
Exposed paddle
Typical Operating Circuit appears at end of data sheet.
相關(guān)PDF資料
PDF描述
MAX8555A Low-Cost. High-Reliability. 0.5V to 3.3V ORing MOSFET Controllers
MAX8555AETB LJT 85C 85#22 SKT PLUG
MAX8555AEUB Low-Cost, High-Reliability, 0.5V to 3.3V ORing MOSFET Controllers
MAX8555ETB Low-Cost, High-Reliability, 0.5V to 3.3V ORing MOSFET Controllers
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX8555AETB 制造商:Maxim Integrated Products 功能描述:LOW-COST, HIGH-RELIABILITY, 0.5V TO 3.3V O-RI - Rail/Tube
MAX8555AETB-T 功能描述:功率驅(qū)動器IC RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube
MAX8555AEUB 功能描述:功率驅(qū)動器IC RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube
MAX8555AEUB+ 功能描述:功率驅(qū)動器IC .5-3.3V ORing MOSFET Controller RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube
MAX8555AEUB+T 功能描述:功率驅(qū)動器IC .5-3.3V ORing MOSFET Controller RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube
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