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參數(shù)資料
| 型號(hào)： | LTC3109IUF#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.026 A SWITCHING REGULATOR, PQCC20 |
| 封裝： | 4 X 4 MM, LEAD FREE, PLASTIC, MO-220WGGD-1, QFN-20 |
| 文件頁數(shù)： | 1/24頁 |
| 文件大?。?/td> | 329K |
| 代理商： | LTC3109IUF#TRPBF |
LTC3109
3109f
Typical applicaTion
FeaTures
DescripTion
Auto-Polarity, Ultralow
Voltage Step-Up Converter
and Power Manager
The LTC3109 is a highly integrated DC/DC converter ideal
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.
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.
The LTC3109 is available in a small, thermally enhanced
20-lead (4mm
× 4mm) QFN package and a 20-lead SSOP
package.
VOUT Current vs TEG Voltage
applicaTions
n
Operates from Inputs as Low as ±30mV
n
Less Than ±1°C Needed Across TEG to Harvest
Energy
n
Proprietary Auto-Polarity Architecture
n
Complete Energy Harvesting Power Management
System
– Selectable VOUT of 2.35V, 3.3V, 4.1V or 5V
– 2.2V, 5mA LDO
– Logic-Controlled Output
– Energy Storage Capability for Operation During
Power Interruption
n
Power Good Indicator
n
Uses Compact Step-up Transformers
n
Small, 20-lead (4mm
× 4mm) QFN Package or
20-Lead SSOP
n
Remote Sensor and Radio Power
n
HVAC Systems
n
Automatic Metering
n
Building Automation
n
Predictive Maintenance
n
Industrial Wireless Sensing
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.
GND
1F
5.25V
2.2V
LTC3109
3.3V
CSTORE
3109 TA01a
C1A
1nF
2.2F
470pF
47F
1nF
470pF
1:100
TEG
(THERMOELECTRIC GENERATOR)
±30mV TO ±500mV
1:100
VOUT2
C2A
C1B
C2B
SWB
VINB
VS1
VS2
SWA
VINA
VOUT
VLDO
PG00D
VOUT2_EN
VSTORE
VAUX
+
470F
OPTIONAL SWITCHED OUTPUT FOR SENSORS
+
P
LOW POWER
RADIO
SENSOR(S)
VTEG (mV)
–300
0
I VOUT
(A)
100
300
400
500
100
900
3109 TA01b
200
–100
–200
200
0
300
600
700
800
1:100 TRANSFORMERS
C1A = C1B = 1nF
VOUT = 3.3V
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