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LT3495EDDB-1-PBF

更新时间： 2024-11-05 05:43:31
品牌 Logo 应用领域
凌特 - Linear 转换器升压转换器
页数 文件大小 规格书
16页 325K
描述
650mA/350mA Micropower Low Noise Boost Converter with Output Disconnect

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中文翻译

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LT3495EDDB-1-PBF 数据手册

 浏览型号LT3495EDDB-1-PBF的Datasheet PDF文件第2页浏览型号LT3495EDDB-1-PBF的Datasheet PDF文件第3页浏览型号LT3495EDDB-1-PBF的Datasheet PDF文件第4页浏览型号LT3495EDDB-1-PBF的Datasheet PDF文件第5页浏览型号LT3495EDDB-1-PBF的Datasheet PDF文件第6页浏览型号LT3495EDDB-1-PBF的Datasheet PDF文件第7页 
LT3495/LT3495B/  
LT3495-1/LT3495B-1  
650mA/350mA Micropower  
Low Noise Boost Converter  
with Output Disconnect  
DESCRIPTION  
FEATURES  
TheLT®3495/LT3495B/LT3495-1/LT3495B-1arelownoise  
boost converters with integrated power switch, feedback  
resistor and output disconnect circuitry. The parts control  
power delivery by varying both the peak inductor current  
and switch off-time. This novel* control scheme results  
in low output voltage ripple as well as high efficiency  
over a wide load range. For the LT3495/LT3495-1, the  
off-time of the switch is not allowed to exceed a fixed  
level, guaranteeing the switching frequency stays above  
the audio band for the entire load range. The parts feature  
a high performance NPN power switch with a 650mA  
and 350mA current limit for the LT3495/LT3495B and  
LT3495-1/LT3495B-1 respectively. The quiescent current  
is a low 60μA, which is further reduced to 0.1μA in shut-  
down. The internal disconnect circuitry allows the output  
voltage to be isolated from the input during shutdown. An  
auxiliary reference input (CTRL pin) overrides the internal  
1.235V feedback reference with any lower value allowing  
full control of the output voltage during operation. The  
LT3495 series are available in a tiny 10-lead 3mm × 2mm  
DFN package.  
n
Low Quiescent Current  
60μA in Active Mode  
0.1μA in Shutdown Mode  
n
Low Noise Control Scheme (Switching Frequency  
Always Stays Above Audible Range for LT3495/-1)  
n
Integrated Power NPN:  
650mA Current Limit (LT3495/B)  
350mA Current Limit (LT3495-1/B-1)  
n
Integrated Output Disconnect  
n
Integrated Output Dimming  
n
Wide input range: 2.3V to 16V  
n
Wide output range : Up to 40V  
n
Integrated feedback resistor  
n
Tiny 10-Lead 3mm × 2mm DFN Package  
APPLICATIONS  
n
OLED Power  
n
Low Noise Power  
n
MP3 Player  
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners. *Patent pending.  
TYPICAL APPLICATION  
Output Voltage Ripple  
vs Load Current  
Efficiency vs Load Current  
OLED Power Supply from One Li-Ion Cell  
50  
40  
30  
20  
10  
0
90  
80  
70  
60  
50  
40  
400  
320  
240  
160  
80  
10μH  
V
= 3.6V  
ONE  
Li-Ion  
CELL  
IN  
LOAD FROM CAP  
LOAD FROM V  
1.0μF 0603  
CAPACITOR AT V  
4.7μF  
2.2μF  
OUT  
OUT  
SW  
CAP  
V
OUT  
16V  
V
CC  
V
OUT  
70mA  
LT3495  
909k  
1μF  
SHDN  
FB  
CTRL  
GND  
3495 TA01a  
2.2μF 1206  
CAPACITOR AT V  
OUT  
0
0
1
10  
100  
0.1  
1
10  
100  
LOAD CURRENT (mA)  
LOAD CURRENT (mA)  
3495 TA01b  
3495 TA01c  
3495b1b1f  
1
1234567...16

中文翻译

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