LTC3109_15 Datasheet, PDF (20/24 Pages) Linear Technology – Auto-Polarity, Ultralow Voltage Step-Up Converter and Power Manager

LTC3109
Typical Applications
Unipolar Energy Harvester Charges Battery Backup
THERMOELECTIC
GENERATOR
FERROTEC 9500/127/100B
T1
33nF
+
1:50
••
–
47µF
1nF
330k
T1: COILCRAFT
LPR6235-123QML
Typical P_VOUT vs dT for Unipolar
Configuration
5.0
FERROTEC 9500/127/100B
4.5 _{C1 = 33nF}
4.0
T1 = COILCRAFT LPR6235-123QML
1:50 RATIO
3.5 VOUT = 3.3V
3.0
2.5
2.0
1.5
1.0
0.5
0
0 1 2 3 4 5 6 7 8 9 10
dT (°K)
3109 TA06b
C1A
V_OUT2
C2A
V_OUT
LTC3109
SWA VLDO
V_INA
C1B
C2B PG00D
SWB
V_INB
VS1
VS2
V_{OUT2_EN}
VSTORE
VAUX
GND
+
2.2V
VLDO
2.2µF
330µF
4V
V_OUT
3.3V
PGOOD
FAIRCHILD
FDG328P
LTC4070
1µF
LBO
HBO NC
4.1V
+ _{Li-Ion NC}
BATTERY
NTC
DRV NC
V_CC NTCBIAS NC
ADJ
GND
3109 TA06a
20
Dual-Input Energy Harvester Generates 5V and 2.2V from Either or Both TEGs,
Operating at Different Temperatures of Fixed Polarity
THERMOELECTRIC
GENERATOR
25mV TO 500mV
THERMOELECTRIC
GENERATOR OR
THERMOPILE
35mV TO 1000mV
COILCRAFT
LPR6235-752SML _1nF
1:100
+_••
–
470pF
COILCRAFT
LPR6235-123QML 4.7nF
1:50
+••
–
470pF
C1A
V_OUT2
LTC3109
C2A
SWA
V_INA
V_OUT
VLDO
C1B
5V
+
2.2V
V_OUT
C_OUT*
VLDO
2.2µF
C2B
SWB
V_INB
VS1
VS2
PG00D
V_{OUT2_EN}
VSTORE
VAUX
GND
PG00D
1µF
3109 TA04
*THE VALUE OF THE C_OUT CAPACITOR IS
DETEMINED BY THE LOAD CHARACTERISTICS
For more information www.linear.com/LTC3109
3109fb