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LT3460 PDF预览

LT3460

更新时间: 2024-11-24 14:58:15
品牌 Logo 应用领域
亚德诺 - ADI 转换器
页数 文件大小 规格书
12页 201K
描述
采用 SC70、ThinSOT 和 DFN 封装的 1.3MHz / 650kHz 升压型 DC/DC 转换器

LT3460 数据手册

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LT3460/LT3460-1  
1.3 MHz/650kHz Step-Up  
DC/DC Converter in SC70,  
ThinSOT and DFN  
FEATURES  
DESCRIPTION  
The LT®3460/LT3460-1 are general purpose step-up DC/  
DC converters. The LT3460/LT3460-1 switch at 1.3MHz/  
650kHz, allowing the use of tiny, low cost and low height  
capacitors and inductors. The constant frequency results  
in low, predictable output noise that is easy to filter.  
n
1.3MHz (LT3460) Switching Frequency  
n
650kHz (LT3460-1) Switching Frequency  
n
High Output Voltage: Up to 36V  
n
300mA Integrated Switch (LT3460)  
n
180mA Integrated Switch (LT3460-1)  
n
Wide Input Range: 2.5V to 16V  
The high voltage switches in the LT3460/LT3460-1 are  
rated at 38V, making the device ideal for boost converters  
up to 36V. The LT3460 can generate 12V at up to 70mA  
from a 5V supply.  
n
Uses Small Surface Mount Components  
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Low Shutdown Current: <1μA  
n
Low Profile (1mm) SC70 (LT3460 and LT3460-1),  
SOT-23 (ThinSOT™) (LT3460) and 2mm × 2mm DFN  
(LT3460-1) Packages  
The low 1mA quiescent current and 650kHz switching  
frequency of LT3460-1 make it ideal for lower current  
applications.  
APPLICATIONS  
n
Digital Cameras  
The LT3460 is available in SC70 and SOT-23 packages.  
The LT3460-1 is available in SC70 and 2mm × 2mm DFN  
packages.  
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. ThinSOT is  
a trademark of Linear Technology Corporation. All other trademarks are the property of their  
respective owners.  
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  
Efficiency  
TYPICAL APPLICATION  
90  
85  
80  
75  
70  
65  
60  
5V to 12V, 70mA Step-Up DC/DC Converter  
22μH  
V
OUT  
V
IN  
5V  
12V  
70mA  
130k  
15k  
22pF  
V
4.7μF  
SW  
IN  
LT3460  
GND  
OFF ON  
SHDN  
FB  
1μF  
0
20  
40  
60  
80  
LOAD CURRENT (mA)  
3460 F01a  
Switching Waveforms  
3460 F01  
V
SW  
5V/DIV  
I
L
100mA/DIV  
3460 F01b  
0.2μs/DIV  
3460fb  
1

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