Datasheet

LTC3109
14
3109fb
For more information www.linear.com/LTC3109
applicaTions inForMaTion
GND
10µF
LTC3109
3109 F03a
C1A
C1
1nF
330k
T1
• •
V
OUT2
V
OUT2
C2A
C1B
C2B
SWB
V
INB
VS1
V
OUT
SET
VS2
SWA
V
INA
V
OUT
VLDO VLDO
V
OUT
2.2µF
C
IN
V
IN
PG00D
V
OUT2_EN
PG00D
V
OUT2_ENABLE
NOTE: VALUES FOR C
IN
, T1, C1 AND C
OUT
ARE DETERMINED BY THE APPLICATION
VSTORE
VAUX
+
C
OUT
+
Figure 3. Unipolar Application
Typical I
VOUT
vs V
IN
for Unipolar
Configuration
Typical Efficiency vs V
IN
for
Unipolar Configuration
V
IN
(mV)
10
10
I
VOUT
(µA)
100
1000
10000
100 1000
3109 F03b
1:100, C1 = 6.8nF
1:50, C1 = 33nF
1:20, C1 = 68nF
V
OUT
= 3.3V
V
IN
(mV)
10
20
EFFICIENCY (%)
30
40
100 1000
3109 F03c
10
0
60
50
15
25
35
5
55
45
1:100, C1 = 6.8nF
1:50, C1 = 33nF
1:20, C1 = 68nF
Typical Input Current vs V
IN
for
Unipolar Configuration
Typical R
IN
vs V
IN
for Unipolar
Configuration
V
IN
(mV)
10
200
INPUT CURRENT (mA)
300
400
100 1000
3109 F03d
100
0
600
500
150
250
350
50
550
450
1:100, C1 = 6.8nF
1:50, C1 = 33nF
1:20, C1 = 68nF
V
IN
(mV)
10
INPUT RESISTANCE (Ω)
1.0
2.0
100 1000
3109 F03e
0
4.0
3.0
1.5
0.5
3.5
2.5
1:100, C1 = 6.8nF
1:50, C1 = 33nF
1:20, C1 = 68nF
dT (°K)
100
0.1
P
OUT
(mW)
1
10
10
3109 F03f
V
OUT
= 5V
V
OUT
= 3.3V
FERROTEC 9500/127/100B, 40mm TEG
C1 = 33nF,
T1 = COILCRAFT LPR6235-123QML
1:50 RATIO
Typical P
VOUT
vs dT for Unipolar
Configuration