Datasheet
LTC3109
5
3109fb
For more information www.linear.com/LTC3109
Typical perForMance characTerisTics
Resonant Switching Waveforms LDO Load Regulation LDO Dropout Voltage
Start-Up Voltage Sequencing
V
OUT
and PGOOD Response
During a Step Load V
OUT
Ripple
V
OUT
and VLDO vs Temperature
VAUX Clamp Voltage
vs Shunt Current
P
VOUT
vs dT and TEG Size,
1:100 Ratio, V
OUT
= 5V
T
A
= 25°C, unless otherwise noted.
TEMPERATURE (°C)
–50
CHANGE (%) (RELATIVE TO 25°C)
0.75
25
3109 G06
0
–0.50
–25 0 50
–0.75
–1.00
1.00
0.50
0.25
–0.25
75 100 125
VLDO
V
OUT
VAUX SHUNT CURRENT (mA)
0
VAUX (V)
5.3
5.4
5.5
12
3109 G07
5.2
5.1
5.0
3
6
9
15
dT (°K)
0
P
VOUT
(mW)
1.0
2.0
3.0
0.5
1.5
2.5
2 4 6 8
3109 G08
1010 3 5 7 9
FERROTEC 9500/127/100B
40mm
FERROTEC 9501/071/040B
22mm
20µs/DIV
C1 A OR B
2V/DIV
C2 A OR B
2V/DIV
3109 G9
LDO LOAD (mA)
0
–1.00
DROP IN VLDO (%)
–0.75
–0.50
0.5
1
1.5 2 32.5 3.5
–0.25
0.00
4
3109 G10
LDO LOAD (mA)
0
0.00
DROPOUT VOLTAGE (V)
0.04
0.08
0.12
0.5
1
1.5 2 32.5 3.5
0.16
0.20
0.02
0.06
0.10
0.14
0.18
4
3109 G11
10SEC/DIV
3109 G12
CH1
VSTORE
1V/DIV
CH2, V
OUT
1V/DIV
CH3, V
LDO
1V/DIV
V
IN
= 50mV
1:100 RATIO TRANSFORMER
C
OUT
= 220µF
C
STORE
= 470µF
C
LDO
= 2.2µF
5ms/DIV
3109 G13
CH2
V
OUT
1V/DIV
CH1
PGD
1V/DIV
50mA LOAD STEP
C
OUT
= 220µF
100ms/DIV
3109 G14
20mV/
DIV
30µA LOAD
C
OUT
= 220µF