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LTC3109_12

更新时间： 2024-11-13 11:57:43
品牌 Logo 应用领域
凌特 - Linear 转换器
页数 文件大小 规格书
24页 244K
描述
Auto-Polarity, Ultralow Voltage Step-Up Converter

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中文翻译

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LTC3109_12 数据手册

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LTC3109  
Auto-Polarity, Ultralow  
Voltage Step-Up Converter  
and Power Manager  
DESCRIPTION  
TheLTC®3109isahighlyintegratedDC/DCconverterideal  
for harvesting surplus energy from extremely low input  
voltage sources such as TEGs (thermoelectric genera-  
tors) and thermopiles. Its unique, proprietary autopolarity  
topology* allows it to operate from input voltages as low  
as 30mV, regardless of polarity.  
FEATURES  
n
Operates from Inputs as Low as ±±3mV  
n
Less Than ±ꢀ1C ꢁeeꢂeꢂ ꢃAross TEG to ꢄarvest  
Energy  
n
Proprietary ꢃuto-Polarity ꢃrAhiteAture  
n
Complete Energy ꢄarvesting Power Management  
System  
– SeleAtable V  
of 2.±5V, ±.±V, 4.ꢀV or 5V  
OUT  
Using two compact step-up transformers and external  
energy storage elements, the LTC3109 provides a com-  
plete power management solution for wireless sensing  
and data acquisition. The 2.2V LDO can power an external  
microprocessor,whilethemainoutputcanbeprogrammed  
to one of four fixed voltages. The power good indicator  
signals that the main output is within regulation. A second  
output can be enabled by the host. A storage capacitor (or  
battery) can also be charged to provide power when the  
input voltage source is unavailable. Extremely low quies-  
cent current and high efficiency maximizes the harvested  
energy available for the application.  
– 2.2V, 5mꢃ LDO  
– LogiA-Controlleꢂ Output  
– Energy Storage Capability for Operation During  
Power Interruption  
n
n
n
Power Gooꢂ InꢂiAator  
Uses Compact Step-up Transformers  
Small, 20-lead (4mm × 4mm) QFN Package or  
20-Lead SSOP  
APPLICATIONS  
n
Remote Sensor and Radio Power  
The LTC3109 is available in a small, thermally enhanced  
20-lead (4mm × 4mm) QFN package and a 20-lead SSOP  
package.  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear  
Technology Corporation. All other trademarks are the property of their respective owners.  
*Patent pending.  
n
HVAC Systems  
n
Automatic Metering  
n
Building Automation  
n
Predictive Maintenance  
n
Industrial Wireless Sensing  
TYPICAL APPLICATION  
TEG  
(THERMOELECTRIC GENERATOR)  
1nF  
VOUT Current vs TEG Voltage  
30mV TO 500mV  
1:100  
C1A  
V
OPTIONAL SWITCHED OUTPUT FOR SENSORS  
OUT2  
•
•
900  
800  
700  
600  
500  
400  
300  
200  
100  
1:100 TRANSFORMERS  
C1A = C1B = 1nF  
470pF  
3.3V  
2.2V  
C2A  
V
47μF  
OUT  
V
OUT  
= 3.3V  
+
470μF  
SWA  
VLDO  
2.2μF  
V
LOW POWER  
RADIO  
INA  
1nF  
LTC3109  
1:100  
C1B  
•
•
SENSOR(S)  
μP  
470pF  
C2B  
PG00D  
SWB  
V
OUT2_EN  
V
INB  
5.25V  
VS1  
VS2  
VAUX  
VSTORE  
VAUX  
0
+
–300 –200 –100  
0
300  
100  
200  
1μF  
C
STORE  
GND  
V
(mV)  
TEG  
3109 TA01a  
3109 TA01b  
3109fa  
1
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