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LTC3109 Datasheet(PDF) 14 Page - Linear Technology

Part # LTC3109
Description  Auto-Polarity, Ultralow Voltage Step-Up Converter and Power Manager
PDF  24 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3109 Datasheet(HTML) 14 Page - Linear Technology

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LTC3109

3109f
applicaTions inForMaTion
GND
10µF
LTC3109
3109 F03a
C1A
C1
1nF
330k
T1
•
•
VOUT2
VOUT2
C2A
C1B
C2B
SWB
VINB
VS1
VOUT
SET
VS2
SWA
VINA
VOUT
VLDO
VLDO
VOUT
2.2µF
CIN
VIN
PG00D
VOUT2_EN
PG00D
VOUT2_ENABLE
NOTE: VALUES FOR CIN, T1, C1 AND COUT
ARE DETERMINED BY THE APPLICATION
VSTORE
VAUX
+
COUT
+
Figure 3. Unipolar Application
Typical IVOUT vs VIN for Unipolar
Configuration
Typical Efficiency vs VIN for
Unipolar Configuration
VIN (mV)
10
10
100
1000
10000
100
1000
3109 F03b
1:100, C1 = 6.8nF
1:50, C1 = 33nF
1:20, C1 = 68nF
VOUT = 3.3V
VIN (mV)
10
20
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 VIN for
Unipolar Configuration
Typical RIN vs VIN for Unipolar
Configuration
VIN (mV)
10
200
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
VIN (mV)
10
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
1
10
10
3109 F03f
VOUT = 5V
VOUT = 3.3V
FERROTEC 9500/127/100B, 40mm TEG
C1 = 33nF,
T1 = COILCRAFT LPR6235-123QML
1:50 RATIO
Typical PVOUT vs dT for Unipolar
Configuration



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