LTC3109

20

3109fa

TYPICAL APPLICATIONS

Dual-Input Energy Harvester Generates 5V and 2.2V from Either or Both TEGs,

Operating at Different Temperatures of Fixed Polarity

GND

1μF

2.2V

LTC3109

5V

VLDO

3109 TA04

C1A

1nF

+

–

+

–

2.2μF

470pF

THERMOELECTRIC

GENERATOR

25mV TO 500mV

THERMOELECTRIC

GENERATOR OR

THERMOPILE

35mV TO 1000mV

4.7nF

470pF

COILCRAFT

LPR6235-752SML

1:100

••

COILCRAFT

LPR6235-123QML

1:50

••

C2A

C1B

C2B

SWB

VS1

VS2

SWA

VLDO

PG00D

PG00D

DETEMINED BY THE LOAD CHARACTERISTICS

VSTORE

VAUX

+

Unipolar Energy Harvester Charges Battery Backup

GND

1μF

LTC3109

3109 TA06a

C1A

33nF

Li-Ion

BATTERY

FAIRCHILD

FDG328P

1nF

330k

T1

1:50

+

–

••

C2A

C1B

C2B

SWB

T1: COILCRAFT

LPR6235-123QML

VS1

VS2

SWA

VLDO

VLDO

PGOOD

3.3V

4.1V

NC

2.2μF

47μF

THERMOELECTIC

GENERATOR

FERROTEC 9500/127/100B

330μF

4V

2.2V

PG00D

VSTORE

VAUX

+

LBO

NTC

ADJ

NC

NC

NC

HBO

DRV

NTCBIAS

LTC4070

GND

+

dT (°K)

0

3.0

4.0

5.0

8

3109 TA06b

2.0

1.0

2.5

3.5

4.5

1.5

0.5

0

2

1

4

3

67

9

5

10

FERROTEC 9500/127/100B

C1 = 33nF

T1 = COILCRAFT LPR6235-123QML

1:50 RATIO

Configuration