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LTC3525L-3.3 PDF预览

LTC3525L-3.3

更新时间: 2024-01-18 22:47:31
品牌 Logo 应用领域
凌特 - Linear 转换器
页数 文件大小 规格书
22页 237K
描述
Ultralow Voltage Step-Up Converter

LTC3525L-3.3 数据手册

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LTC3108  
Ultralow Voltage Step-Up  
Converter and Power Manager  
FEATURES  
DESCRIPTION  
TheLTC®3108isahighlyintegratedDC/DCconverterideal  
forharvestingandmanagingsurplusenergyfromextremely  
low input voltage sources such as TEGs (thermoelectric  
generators),thermopilesandsmallsolarcells.Thestep-up  
topology operates from input voltages as low as 20mV.  
The LTC3108 is functionally equivalent to the LTC3108-1  
n
Operates from Inputs of 20mV  
n
Complete Energy Harvesting Power  
Management System  
- Selectable V  
of 2.35V, 3.3V, 4.1V or 5V  
OUT  
- LDO: 2.2V at 3mA  
- Logic Controlled Output  
- Reserve Energy Output  
Power Good Indicator  
Uses Compact Step-Up Transformers  
Small 12-Lead (3mm × 4mm) DFN or 16-Lead  
SSOP Packages  
except for its unique fixed V  
options.  
OUT  
n
n
n
Usingasmallstep-uptransformer,theLTC3108providesa  
completepowermanagementsolutionforwirelesssensing  
and data acquisition. The 2.2V LDO powers an external  
microprocessor, while the main output is programmed to  
one of four fixed voltages to power a wireless transmitter  
orsensors.Thepowergoodindicatorsignalsthatthemain  
outputvoltageiswithinregulation.Asecondoutputcanbe  
enabled by the host. A storage capacitor provides power  
when the input voltage source is unavailable. Extremely  
low quiescent current and high efficiency design ensure  
the fastest possible charge times of the output reservoir  
capacitor.  
APPLICATIONS  
n
Remote Sensors and Radio Power  
n
Surplus Heat Energy Harvesting  
n
HVAC Systems  
n
Industrial Wireless Sensing  
n
Automatic Metering  
n
Building Automation  
n
Predictive Maintenance  
The LTC3108 is available in a small, thermally enhanced  
12-lead (3mm × 4mm) DFN package and a 16-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.  
TYPICAL APPLICATION  
Wireless Remote Sensor Application Powered From a Peltier Cell  
VOUT Charge Time  
1nF  
1:100  
5V  
1000  
100  
10  
1
C1  
VSTORE  
LTC3108  
V
C
= 3.3V  
= 470μF  
+
+
OUT  
OUT  
+
0.1F  
6.3V  
THERMOELECTRIC  
GENERATOR  
220μF  
330pF  
V
OUT2  
C2  
PGOOD  
2.2V  
PGD  
VLDO  
μP  
20mV TO 500mV  
SW  
2.2μF  
SENSORS  
RF LINK  
3.3V  
VS2  
V
OUT  
+
470μF  
1:100 Ratio  
1:50 Ratio  
1:20 Ratio  
VS1  
V
OUT2_EN  
GND  
3108 TA01a  
VAUX  
0
100 150 200 250 300 350 400  
(mV)  
0
50  
1μF  
V
IN  
3108 TA01b  
3108fb  
1

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