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LT3461 PDF预览

LT3461

更新时间: 2024-11-24 14:57:59
品牌 Logo 应用领域
亚德诺 - ADI 转换器
页数 文件大小 规格书
10页 531K
描述
采用 ThinSOT 封装并具集成型肖特基整流器的 1.3MHz 升压型DC/DC 转换器

LT3461 数据手册

 浏览型号LT3461的Datasheet PDF文件第2页浏览型号LT3461的Datasheet PDF文件第3页浏览型号LT3461的Datasheet PDF文件第4页浏览型号LT3461的Datasheet PDF文件第5页浏览型号LT3461的Datasheet PDF文件第6页浏览型号LT3461的Datasheet PDF文件第7页 
LT3461/LT3461A  
1.3MHz/3MHz Step-Up  
DC/DC Converters with  
Integrated Schottky in ThinSOT  
FEATURES  
DESCRIPTION  
TheLT®3461/LT3461Aaregeneralpurposefixedfrequency  
current mode step-up DC/DC converters. Both devices  
n
Integrated Schottky Rectifier  
n
Fixed Frequency 1.3MHz/3MHz Operation  
n
High Output Voltage: Up to 38V  
feature an integrated Schottky and a low V  
switch al-  
CESAT  
n
Low V  
Switch: 260mV at 250mA  
lowingasmallconverterfootprintandlowerpartscost.The  
LT3461 switches at 1.3MHz while the LT3461A switches  
at 3MHz. These high switching frequencies enable the use  
of tiny, low cost and low height capacitors and inductors.  
The constant switching frequency results in predictable  
output noise that is easy to filter, and the inductor based  
topology ensures an input free from switching noise typi-  
callypresentwithchargepumpsolutions.Thehighvoltage  
switch in the LT3461/LT3461A is rated at 40V making the  
device ideal for boost converters up to 38V.  
CESAT  
n
n
n
n
n
n
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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 (ThinSOT™) Package  
APPLICATIONS  
The LT3461/LT3461A are available in a low profile (1mm)  
SOT-23 package.  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and  
ThinSOT is a trademark of Linear Technology Corporation.  
n
Digital Cameras  
n
CCD Bias Supply  
n
XDSL Power Supply  
n
TFT-LCD Bias Supply  
n
Local 5V or 12V Supply  
n
Medical Diagnostic Equipment  
n
Battery Backup  
TYPICAL APPLICATION  
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
5
3
12V  
V
C1  
1µF  
IN  
75  
70  
65  
60  
70mA  
V
= 3.3V  
IN  
LT3461A  
261k  
15pF  
4
SHDN  
OFF ON  
FB  
GND  
2
C2  
1µF  
30.1k  
3461 TA01a  
0
20  
40  
60  
80  
3461 TAO1b  
LOAD CURRENT (mA)  
3461afa  
1
For more information www.linear.com/LT3461  

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