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LTC3622

更新时间： 2024-11-26 14:58:27
品牌 Logo 应用领域
亚德诺 - ADI 稳压器
页数 文件大小 规格书
24页 1258K
描述
具超低静态电流的 17V、双通道、1A 同步降压型稳压器

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中文翻译

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LTC3622 数据手册

 浏览型号LTC3622的Datasheet PDF文件第2页浏览型号LTC3622的Datasheet PDF文件第3页浏览型号LTC3622的Datasheet PDF文件第4页浏览型号LTC3622的Datasheet PDF文件第5页浏览型号LTC3622的Datasheet PDF文件第6页浏览型号LTC3622的Datasheet PDF文件第7页 
LTC3622/  
LTC3622-2/LTC3622-23/5  
17V, Dual 1A  
Synchronous Step-Down Regulator  
with Ultralow Quiescent Current  
FEATURES  
DESCRIPTION  
TheLTC®3622isadual1Aoutput,highefficiencysynchro-  
nousmonolithicstep-downregulatorcapableofoperating  
from input supplies up to 17V. The switching frequency is  
fixed to 1MHz or 2.25MHz with a 50% synchronization  
range to an external clock. The regulator features ultralow  
quiescent current and high efficiency over a wide output  
voltage range.  
n
Dual Step-Down Outputs: 1A Per Channel  
n
n
n
n
Wide V Range: 2.7V to 17V  
IN  
Wide V  
Range: 0.6V to V  
OUT  
IN  
Up to 95% Efficiency  
No-Load I = 5µA with Both Channels Enabled;  
Q
I < 4µA with Only One Channel Enabled  
Q
n
n
High Efficiency, Low Dropout Operation  
(100% Duty Cycle)  
The step-down regulators operate from an input voltage  
range of 2.7V to 17V and provide an adjustable output  
Constant Frequency (1MHz/2.25MHz) with External  
Frequency Synchronization  
from 0.6V to V while delivering up to 1A of output cur-  
IN  
n
n
1% Output Voltage Accuracy  
Current Mode Operation for Excellent Line and Load  
Transient Response  
rent. 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  
ripplenoise.Theswitchingregulatorscanbesynchronized  
n
n
n
n
Phase Shift Programmable with External Clock  
Selectable Current Limit  
Internal Compensation and Soft-Start  
Compact 14-Pin DFN (3mm × 4mm) and 16-Lead  
MSOP Packages  
to an external clock. Furthermore, fixed V  
available to eliminate the external feedback resistors.  
options are  
OUT  
List of LTC3622 Options  
PART NAME  
LTC3622  
FREQUENCY  
1.00MHz  
V
OUT  
APPLICATIONS  
Adjustable  
Adjustable  
5V/3.3V  
n
Battery Powered Systems  
Point-of-Load Supplies  
LTC3622-2  
LTC3622-23/5  
2.25MHz  
n
2.25MHZ  
n
Portable – Handheld Scanners  
All registered trademarks and trademarks are the property of their respective owners. Protected  
by U.S. Patents, including 5481178, 6580258, 6498466, 6611131, 5705919.  
TYPICAL APPLICATION  
Efficiency vs Load Current  
2.5V/5V VOUT Application, fSW = 1MHz  
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Rev D  
1
Document Feedback  
For more information www.analog.com  
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