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LTC3621

更新时间： 2024-11-26 14:58:07
品牌 Logo 应用领域
亚德诺 - ADI 稳压器
页数 文件大小 规格书
20页 910K
描述
具 3.5μA 静态电流的 17V、1A、同步降压型稳压器

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中文翻译

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LTC3621 数据手册

 浏览型号LTC3621的Datasheet PDF文件第2页浏览型号LTC3621的Datasheet PDF文件第3页浏览型号LTC3621的Datasheet PDF文件第4页浏览型号LTC3621的Datasheet PDF文件第5页浏览型号LTC3621的Datasheet PDF文件第6页浏览型号LTC3621的Datasheet PDF文件第7页 
LTC3621/LTC3621-2  
17V, 1A Synchronous  
Step-Down Regulator with  
3.5µA Quiescent Current  
FEATURES  
DESCRIPTION  
n
Wide V Range: 2.7V to 17V  
The LTC®3621/LTC3621-2 is a high efficiency 17V, 1A  
synchronousmonolithicstep-downregulator.Theswitch-  
ing frequency is fixed to 1MHz or 2.25MHz with a ±±40  
synchronizingrange.Theregulatorfeaturesultralowquies-  
IN  
OUT  
n
Wide V  
Range: 0.6V to V  
IN  
n
n
n
n
n
n
n
95% Max Efficiency  
Low I < 3.5µA, Zero-Current Shutdown  
Q
cent current and high efficiencies over a wide V  
range.  
Constant Frequency (1MHz/2.25MHz)  
OUT  
Full Dropout Operation with Low I  
1A Rated Output Current  
Q
The step-down regulator operates from an input voltage  
range of 2.7V to 17V and provides an adjustable output  
±10 Output Voltage Accuracy  
range from 4.6V to V while delivering up to 1A of output  
IN  
Current Mode Operation for Excellent Line and Load  
Transient Response  
current. A user-selectable mode input is provided to allow  
the user to trade off ripple noise for light load efficiency;  
Burst Mode operation provides the highest efficiency at  
lightloads,whilepulse-skippingmodeprovidesthelowest  
voltage ripple. The MODE pin can also be used to allow the  
user to sync the switching frequency to an external clock.  
n
n
Synchronizable to External Clock  
Pulse-Skipping, Forced Continuous, Burst Mode®  
Operation  
n
n
n
Internal Compensation and Soft-Start  
Overtemperature Protection  
Compact 6-Lead DFN (2mm × 3mm) Package or  
Thermally-Enhanced MS8E Package with Power  
Good Output and Independent SGND Pin  
AEC-Q144 Qualified for Automotive Applications  
LTC3621 Options  
PART NAME  
LTC3621  
FREQUENCY  
1.44MHz  
1.44MHz  
1.44MHz  
2.25MHz  
2.25MHz  
2.25MHz  
V
OUT  
Adjustable  
3.3V  
LTC3621-3.3  
LTC3621-5  
LTC3621-2  
LTC3621-23.3  
LTC3621-25  
n
5V  
Adjustable  
3.3V  
APPLICATIONS  
n
Portable-Handheld Scanners  
5V  
n
Industrial and Embedded Computing  
All registered trademarks and trademarks are the property of their respective owners. Protected  
by U.S. patents, including 5±81178, 6584258, 6±98±66, 6611131, 6177787, 5745919,  
58±755±.  
n
Automotive Applications  
Emergency Radio  
n
TYPICAL APPLICATION  
Efficiency and Power Loss vs Load at 1MHz  
ꢒꢊꢊ  
ꢛꢊ  
ꢚꢊ  
ꢖꢊ  
ꢘꢊ  
ꢕꢊ  
ꢔꢊ  
ꢓꢊ  
ꢗꢊ  
ꢒꢊ  
ꢊ
ꢊ.ꢘ  
ꢊ.ꢕ  
ꢊ.ꢔ  
ꢊ.ꢓ  
ꢊ.ꢗ  
ꢊ.ꢒ  
ꢊ
2.5V VOUT with 400mA Burst Clamp, fSW = 1MHz  
ꢜ
ꢝ ꢒꢗꢜ  
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ꢂ.ꢍꢈꢎ  
ꢏ
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ꢏ
ꢔꢕ  
ꢄ.ꢍꢏ ꢊꢐ ꢇꢍꢏ  
ꢏ
ꢖꢗ  
ꢔꢕ  
ꢇꢁꢈꢆ  
ꢀꢁꢂꢃ  
ꢇꢓꢇꢃ  
ꢄꢄꢅꢆ  
ꢘꢊꢙꢉꢀꢄꢇ  
Rꢑꢕ  
ꢆꢛ  
ꢄꢄꢈꢆ  
ꢜꢐDꢝꢞꢖꢟꢕꢙ  
ꢉꢀꢄꢇ ꢊꢋꢁꢇꢌ  
ꢔꢕꢊꢏ  
ꢏꢁꢐꢅR ꢀꢁꢑꢑ  
ꢙꢙ  
ꢚꢕD  
ꢇꢈꢆ  
ꢜ
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ꢝ ꢕꢜ  
ꢝ ꢓ.ꢓꢜ  
ꢝ ꢗ.ꢕꢜ  
ꢁꢄꢇ  
ꢁꢄꢇ  
ꢁꢄꢇ  
ꢊ
ꢊ.ꢗ  
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ꢊ.ꢘ  
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ꢒ
ꢀꢁꢂD ꢃꢄRRꢅꢆꢇ ꢈꢂꢉ  
ꢓꢘꢗꢒ ꢇꢂꢊꢒꢙ  
Rev. D  
1
Document Feedback  
For more information www.analog.com  
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