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LT3461_15

更新时间： 2024-11-27 01:22:35
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
8页 159K
描述
1.3MHz/3MHz Step-Up DC/DC Converters with Integrated Schottky in ThinSOT

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中文翻译

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LT3461_15 数据手册

 浏览型号LT3461_15的Datasheet PDF文件第2页浏览型号LT3461_15的Datasheet PDF文件第3页浏览型号LT3461_15的Datasheet PDF文件第4页浏览型号LT3461_15的Datasheet PDF文件第5页浏览型号LT3461_15的Datasheet PDF文件第6页浏览型号LT3461_15的Datasheet PDF文件第7页 
LT3461/LT3461A  
1.3MHz/3MHz Step-Up  
DC/DC Converters with  
Integrated Schottky in ThinSOT  
U
FEATURES  
DESCRIPTIO  
The LT®3461/LT3461A are general purpose fixed fre-  
quency current mode step-up DC/DC converters. Both  
devices feature an integrated Schottky and a low VCESAT  
switchallowingasmallconverterfootprintandlowerparts  
cost. The LT3461 switches at 1.3MHz while the LT3461A  
switches at 3MHz. These high switching frequencies en-  
abletheuseoftiny, lowcostandlowheightcapacitorsand  
inductors. The constant switching frequency results in  
predictable output noise that is easy to filter, and the  
inductorbasedtopologyensuresaninputfreefromswitch-  
ing noise typically present with charge pump solutions.  
The high voltage switch in the LT3461/LT3461A is rated at  
40V making the device ideal for boost converters up to  
38V.  
■
Integrated Schottky Rectifier  
■
Fixed Frequency 1.3MHz/3MHz Operation  
■
High Output Voltage: Up to 38V  
■
Low VCESAT Switch: 260mV at 250mA  
■
12V at 70mA from 5V Input  
■
5V at 115mA from 3.3V Input  
■
Wide Input Range: 2.5V to 16V  
■
Uses Small Surface Mount Components  
■
Low Shutdown Current: <1µA  
■
Soft-Start  
Low Profile (1mm) SOT-23 (ThinSOTTM) Package  
■
U
APPLICATIO S  
■
Digital Cameras  
■
CCD Bias Supply  
■
XDSL Power Supply  
The LT3461/LT3461A are available in a low profile (1mm)  
SOT-23 package.  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
ThinSOT is a trademark of Linear Technology Corporation.  
■
TFT-LCD Bias Supply  
■
Local 5V or 12V Supply  
■
Medical Diagnostic Equipment  
■
Battery Backup  
U
TYPICAL APPLICATIO  
5V to 12V, 70mA Step-Up DC/DC Converter  
Efficiency  
85  
L1  
10µH  
V
IN  
5V  
80  
1
V
= 5V  
IN  
V
SW  
V
OUT  
OUT  
6
4
5
3
12V  
V
C1  
IN  
75  
70  
65  
60  
V
= 3.3V  
70mA  
IN  
1µF  
LT3461A  
261k  
15pF  
SHDN  
OFF ON  
FB  
GND  
2
C2  
1µF  
30.1k  
3461 TA01a  
0
20  
40  
60  
80  
3461 TAO1b  
LOAD CURRENT (mA)  
3461af  
1
12345678

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