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Linear Technology Electronic Components Datasheet

LTC3107 Datasheet

Ultra-Low Voltage Energy Harvester and Primary Battery-Life Extender

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Features
LTC3107
Ultra-Low Voltage
Energy Harvester and
Primary Battery Life Extender
Description
n Thermal Energy Harvesting Assisted Power
Management System
n VOUT Tracks the Primary Battery Voltage
n 2.2V LDO Output
n Reserve Energy Output, Clamped to 4.3V
n Operates from Inputs as Low as 20mV
n Battery In-Use Indicator (BAT_OFF)
n IQ from Battery:
n 80nA When Energy Harvesting
n 6µA No Energy Harvesting
n Standard, Compact Step-Up Transformer
n Small, Thermally Enhanced 10-lead (3mm × 3mm)
DFN package
Applications
n Industrial Wireless Sensing
n Remote Sensor and Radio power
n HVAC
n Automatic Metering
n Building Automation, Security
n Predictive Maintenance, Condition Monitoring
The LTC®3107 is a highly integrated DC/DC converter de-
signed to extend the life of a primary battery in low power
wireless systems by harvesting and managing surplus en-
ergyfromextremely lowinputvoltage sources suchasTEGs
(Thermoelectric Generators) and thermopiles. The step-up
topology operates from input voltages as low as 20mV.
Using a small step-up transformer, the LTC3107
provides a complete power management solution for
typical wireless sensor applications that operate from a
primary battery. The 2.2V LDO can be used to power an
external microprocessor, while the main output voltage
automatically adapts to match the voltage of the primary
battery. The LTC3107 seamlessly transitions from battery
power to harvested power whenever harvested energy is
available, extending the life of the battery. The BAT_OFF
indicator can be used to track battery usage. An optional
storage capacitor accumulates excess harvested energy,
further extending battery life.
The LTC3107 is available in a small, thermally enhanced
10-lead (3mm × 3mm) DFN package.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and VLDO
is a trademark of Linear Technology Corporation. All other trademarks are the property of their
respective owners.
Typical Application
TEG Powered Thermal Harvester with Primary Cell Life Extender
THERMOELECTRIC
GENERATOR
T1 1nF
VIN 1:100
C1
VBAT
330pF
LTC3107
10µF
3.6V
C2 BAT_OFF
SW VOUT
GND
VLDO
VLDO
VAUX
VSTORE
2.2µF
+
10µF
CSTORE
(OPTIONAL)
3.6V
+
VOUT
COUT
3107 TA01a
For more information www.linear.com/LTC3107
Percentage of Added Battery Life
vs TEG Surface Temperature
100000 TA = 23°C
10000
1000
100
10
1
25
CUI CP20151 TEG
24×24×22mm HEATSINK
NATURAL CONVECTION
0.5Hz XMT RATE (227µW AVG)
1Hz XMT RATE (437µW AVG)
2Hz XMT RATE (679µW AVG)
30 35 40 45
SURFACE TEMPERATURE (°C)
50
3107 TA01
3107f
1


Linear Technology Electronic Components Datasheet

LTC3107 Datasheet

Ultra-Low Voltage Energy Harvester and Primary Battery-Life Extender

No Preview Available !

LTC3107
Absolute Maximum Ratings
(Note 1)
SW Voltage .................................................. –0.3V to 2V
C1 Voltage (Note 5).......................–0.3V to (VAUX+0.6V)
C2 Voltage (Note 5).......................................... –8V to 8V
VAUX......................................................15mA into VAUX
VBAT, VSTORE............................................ –0.3V to 4.5V
VOUT, BAT_OFF........................................... –0.3V to 4.5V
VLDO......................................................... –0.3V to 4.5V
Operating Junction Temperature Range
(Note 2).............................................. –40°C to 125°C
Storage Temperature Range................... –65°C to 150°C
Pin Configuration
TOP VIEW
VAUX
VSTORE
VOUT
VBAT
VLDO
1
2
3
4
5
10 SW
11 9 C2
GND 8 C1
7 BAT_OFF
6 GND
DD PACKAGE
10-LEAD (3mm × 3mm) PLASTIC DFN
TJMAX = 125°C, θJA = 43°C/W, θJC = 5.5°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB (Note 4)
Order Information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3107EDD#PBF
LTC3107EDD#TRPBF
LGMD
10-Lead (3mm × 3mm) Plastic DFN
–40°C to 125°C
LTC3107IDD#PBF
LTC3107IDD#TRPBF
LGMD
10-Lead (3mm × 3mm) Plastic DFN
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
3107f
2 For more information www.linear.com/LTC3107


Part Number LTC3107
Description Ultra-Low Voltage Energy Harvester and Primary Battery-Life Extender
Maker Linear
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LTC3107 Datasheet PDF






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