LTC3109_15 Datasheet, PDF (5/24 Pages) Linear Technology – Auto-Polarity, Ultralow Voltage Step-Up Converter and Power Manager

LTC3109
Typical Performance Characteristics T_A = 25°C, unless otherwise noted.
V_OUT and VLDO vs Temperature
1.00
0.75
0.50
VLDO
0.25
0
V_OUT
–0.25
–0.50
–0.75
–1.00
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3109 G06
Resonant Switching Waveforms
C1 A OR B
2V/DIV
C2 A OR B
2V/DIV
20µs/DIV
3109 G9
VAUX Clamp Voltage
vs Shunt Current
5.5
5.4
5.3
5.2
5.1
5.0
0
3
6
9
12
15
VAUX SHUNT CURRENT (mA)
3109 G07
LDO Load Regulation
0.00
–0.25
–0.50
–0.75
–1.00
0 0.5 1 1.5 2 2.5 3 3.5 4
LDO LOAD (mA)
3109 G10
P_VOUT vs dT and TEG Size,
1:100 Ratio, V_OUT = 5V
3.0
2.5
FERROTEC 9500/127/100B
40mm
2.0
1.5
1.0
0.5
FERROTEC 9501/071/040B
22mm
0
0 1 2 3 4 5 6 7 8 9 10
dT (°K)
3109 G08
LDO Dropout Voltage
0.20
0.18
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0.00
0 0.5 1 1.5 2 2.5 3 3.5 4
LDO LOAD (mA)
3109 G11
Start-Up Voltage Sequencing
V_IN = 50mV
1:100 RATIO TRANSFORMER
C_OUT = 220µF
C_STORE = 470µF
C_LDO = 2.2µF
CH1
VSTORE
1V/DIV
CH2, V_OUT
1V/DIV
CH3, V_LDO
1V/DIV
V_OUT and PGOOD Response
During a Step Load
50mA LOAD STEP
C_OUT = 220µF
CH2
V_OUT
1V/DIV
CH1
PGD
1V/DIV
V_OUT Ripple
30µA LOAD
C_OUT = 220µF
20mV/
DIV
10SEC/DIV
3109 G12
5ms/DIV
3109 G13
100ms/DIV
3109 G14
For more information www.linear.com/LTC3109
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