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LTC4373

更新时间： 2024-11-12 02:46:39
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
20页 1410K
描述
Low Quiescent Current Ideal Diode Controller

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中文翻译

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LTC4373 数据手册

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LTC4372/LTC4373  
Low Quiescent Current Ideal Diode Controller  
FEATURES  
DESCRIPTION  
The LTC®4372/LTC4373 are positive high voltage ideal  
diode controllers that drive an external N-channel  
MOSFET to replace a Schottky diode. They control the  
forward voltage drop across the MOSFET to ensure cur-  
rent delivery or current transfer from one path to the other  
even at light loads.  
n
Reduces Power Dissipation by Replacing a Power  
Schottky Diode  
Low Quiescent Current: 5µA Operating, 0.5µA  
Shutdown  
Wide Operating Voltage Range: 2.5V to 80V  
Reverse Supply Protection to –28V  
High Side External N-Channel MOSFET Drive  
Drives Back-to-Back MOSFETs for Inrush Control and  
Load Switching  
n
n
n
n
n
A 5µA operating current achieves high efficiency for inter-  
mittent load applications or always-on backup power sup-  
plies. If a power source fails or is shorted, a fast turn-  
off minimizes reverse current transients. The LTC4372/  
LTC4373 control back-to-back N-channel MOSFETs for  
inrush current control and load switching.  
n
n
Fast Reverse Current Turn-Off within 1.5µs  
8-Lead MSOP and 3mm × 3mm DFN Packages  
APPLICATIONS  
The LTC4372 shutdown function reduces the quiescent  
current to 0.5µA. The LTC4373 has a UV pin for undervolt-  
age monitoring while the UVOUT pin provides hysteresis  
adjustment and status information. During undervoltage,  
the back-to-back MOSFETs are cut off and quiescent cur-  
rent reduces to 0.5μA.  
n
Automotive Battery Protection  
n
Redundant Power Supplies  
n
Portable Instrumentation  
Solar Powered Systems  
Energy Harvesting Applications  
n
n
All registered trademarks and trademarks are the property of their respective owners.  
n
Supply Holdup  
TYPICAL APPLICATION  
12V, 20A Reverse Battery Protection  
Power Dissipation vs Load Current  
ꢀ0  
ꢀ
ꢄꢅꢀ  
ꢅ0ꢆ  
ꢁꢂꢃ  
ꢀꢁꢂ0ꢃꢄꢅ0ꢆꢅꢁꢇ  
ꢀ
ꢀ ꢁꢂꢃ  
ꢁꢂ  
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ꢀ
ꢀꢁ ꢀꢁꢂRꢃꢄ  
ꢀꢁꢂꢃ  
ꢀꢁꢂ  
10μF  
ꢀꢁꢂꢁ  
ꢀꢁꢂ  
ꢀꢁꢂꢃꢄꢅꢆ  
ꢀꢀꢀꢀR  
ꢀꢀꢀꢀꢀ  
ꢀ
ꢀꢁꢂꢃ  
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ꢀꢁꢂꢃꢁ ꢄꢅ0ꢆꢇ  
ꢀ
ꢀ00ꢁꢂ  
ꢀꢀꢀꢀꢀꢀ ꢀꢀꢀꢀ0ꢀꢀꢀ0ꢀꢀꢀꢁꢀ  
0
ꢀ0  
ꢀꢀ  
0
ꢀ0  
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ꢀꢀRRꢀꢀꢀ ꢀꢀꢀ  
ꢀꢁꢂꢃꢁ ꢄꢅ0ꢆꢇ  
Rev. 0  
1
Document Feedback  
For more information www.analog.com  
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