LTC3109
TYPICAL PERFORMANCE CHARACTERISTICS
T
A
= 25°C, unless otherwise noted.
V
OUT
and VLDO vs Temperature
1.00
CHANGE (%) (RELATIVE TO 25°C)
0.75
0.50
VAUX (V)
0.25
0
–0.25
–0.50
–0.75
–1.00
–50 –25
0
75
50
25
TEMPERATURE (°C)
100
125
5.0
0
3
9
12
6
VAUX SHUNT CURRENT (mA)
15
3109 G07
VAUX Clamp Voltage
vs Shunt Current
5.5
3.0
2.5
P
VOUT
vs dT and TEG Size,
1:100 Ratio, V
OUT
= 5V
5.4
VLDO
5.3
V
OUT
P
VOUT
(mW)
FERROTEC 9500/127/100B
40mm
2.0
1.5
1.0
5.2
5.1
0.5
0
0
1
2
3
FERROTEC 9501/071/040B
22mm
4
5 6
dT (°K)
7
8
9
10
3109 G06
3109 G08
Resonant Switching Waveforms
0.00
LDO Load Regulation
0.20
0.18
DROPOUT VOLTAGE (V)
LDO Dropout Voltage
DROP IN VLDO (%)
C1 A OR B
2V/DIV
C2 A OR B
2V/DIV
–0.25
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
–0.50
–0.75
20μs/DIV
3109 G9
–1.00
0
0.5
1
1.5 2 2.5
LDO LOAD (mA)
3
3.5
4
3109 G10
0.00
0
0.5
1
1.5 2 2.5
LDO LOAD (mA)
3
3.5
4
3109 G11
Start-Up Voltage Sequencing
V
IN
= 50mV
1:100 RATIO TRANSFORMER
C
OUT
= 220μF
C
STORE
= 470μF
C
LDO
= 2.2μF
V
OUT
and PGOOD Response
During a Step Load
50mA LOAD STEP
C
OUT
= 220μF
CH1
VSTORE
1V/DIV
CH2, V
OUT
1V/DIV
CH3, V
LDO
1V/DIV
V
OUT
Ripple
30μA LOAD
C
OUT
= 220μF
CH2
V
OUT
1V/DIV
CH1
PGD
1V/DIV
3109 G13
20mV/
DIV
10SEC/DIV
3109 G12
5ms/DIV
100ms/DIV
3109 G14
3109fa
5
LINEAR [ LINEAR INTEGRATED SYSTEMS ]
