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LTC3225-1

更新时间： 2024-09-25 11:41:51
品牌 Logo 应用领域
凌特 - Linear 转换器
页数 文件大小 规格书
18页 1913K
描述
400mA Step-Up DC/DC Converter with Maximum Power Point Control and 250mV Start-Up

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中文翻译

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LTC3225-1 数据手册

 浏览型号LTC3225-1的Datasheet PDF文件第2页浏览型号LTC3225-1的Datasheet PDF文件第3页浏览型号LTC3225-1的Datasheet PDF文件第4页浏览型号LTC3225-1的Datasheet PDF文件第5页浏览型号LTC3225-1的Datasheet PDF文件第6页浏览型号LTC3225-1的Datasheet PDF文件第7页 
LTC3105  
400mA Step-Up DC/DC  
Converter with Maximum Power  
Point Control and 250mV Start-Up  
FEATURES  
DESCRIPTION  
TheLTC®3105isahighefficiencystep-upDC/DCconverter  
that can operate from input voltages as low as 225mV. A  
250mVstart-upcapabilityandintegratedmaximumpower  
pointcontroller(MPPC)enableoperationdirectlyfromlow  
voltage,highimpedancealternativepowersourcessuchas  
photovoltaic cells, TEGs (thermoelectric generators) and  
fuelcells.AuserprogrammableMPPCsetpointmaximizes  
the energy that can be extracted from any power source.  
Burst Mode operation, with a proprietary self adjusting  
peak current, optimizes converter efficiency and output  
voltage ripple over all operating conditions.  
n
Low Start-Up Voltage: 250mV  
n
Maximum Power Point Control  
n
Wide V Range: 225mV to 5V  
IN  
n
Auxiliary 6mA LDO Regulator  
Burst Mode® Operation: I = 24µA  
n
Q
n
Output Disconnect and Inrush Current Limiting  
n
V > V  
Operation  
IN  
OUT  
n
n
n
n
n
Antiringing Control  
Soft Start  
Automatic Power Adjust  
Power Good Indicator  
10-Lead 3mm × 3mm × 0.75mm DFN and 12-Lead  
MSOP Packages  
The AUX powered 6mA LDO provides a regulated rail for  
external microcontrollers and sensors while the main  
output is charging. In shutdown, I is reduced to 10µA  
and integrated thermal shutdown offers protection from  
overtemperature faults. The LTC3105 is offered in 10-lead  
3mm×3mm×0.75mmDFNand12-leadMSOPpackages.  
L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks  
and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the  
property of their respective owners.  
Q
APPLICATIONS  
n
Solar Powered Battery/Supercapacitor Chargers  
n
Energy Harvesting  
n
Remote Industrial Sensors  
Low Power Wireless Transmitters  
Cell Phone, MP3, PMP and GPS Accessory Chargers  
n
n
TYPICAL APPLICATION  
Single Photovoltaic Cell Li-Ion Trickle Charger  
Output Current vs Input Voltage  
80  
10µH  
MPPC DISABLED  
70  
225mV TO 5V  
V
= 3.3V  
OUT  
V
SW  
OUT  
IN  
60  
50  
40  
30  
20  
10  
0
+
–
V
OUT  
PHOTOVOLTAIC  
CELL  
V
4.1V  
10µF  
V
= 4.2V  
OUT  
LTC3105  
1020k  
332k  
V
= 5V  
FB  
OUT  
Li-Ion  
MPPC  
SHDN  
AUX  
PGOOD  
LDO  
OFF  
ON  
2.2V  
10µF  
40.2k  
FBLDO  
GND  
4.7µF  
1µF  
0.2 0.3  
0.5 0.6 0.7 0.8 0.9 1.0  
INPUT VOLTAGE (V)  
0.4  
3105 TA01a  
3105 TA01b  
3105fa  
1
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