Datasheet

LT3468/LT3468-1/LT3468-2
3
346812fa
LT3468-1 Charge Time
LT3468-1 Charging Waveform
LT3468 Input Current LT3468-1 Input Current
LT3468 Charging Waveform
LT3468 Charge Time
V
IN
(V)
23456789
CHARGE TIME (s)
3468 G04
10
9
8
7
6
5
4
3
2
1
0
C
OUT
= 50µF
C
OUT
= 100µF
T
A
= 25°C
V
IN
(V)
23456789
CHARGE TIME (s)
3468 G05
10
9
8
7
6
5
4
3
2
1
0
C
OUT
= 20µF
C
OUT
= 50µF
T
A
= 25°C
V
OUT
(V)
0 50 100 150 200 250 300
AVERAGE INPUT CURRENT (mA)
3468 G07
800
0
200
400
600
V
IN
= 2.8V
V
IN
= 4.2V
V
IN
= 3.6V
T
A
= 25°C
V
OUT
(V)
0 50 100 150 200 250 300
AVERAGE INPUT CURRENT (mA)
3468 G08
400
0
100
200
300
V
IN
= 2.8V
V
IN
= 4.2V
V
IN
= 3.6V
T
A
= 25°C
V
IN
= 3.6V
C
OUT
= 50µF
3468 G01
3468 G02
TYPICAL PERFOR A CE CHARACTERISTICS
UW
1s/DIV
V
IN
= 3.6V
C
OUT
= 100µF
V
OUT
50V/DIV
1s/DIV
AVERAGE
INPUT
CURRENT
1A/DIV
V
OUT
50V/DIV
AVERAGE
INPUT
CURRENT
0.5A/DIV
LT3468 curves use the circuit of Figure 6, LT3468-1
curves use the circuit of Figure 7 and LT3468-2 use the circuit of Figure 8 unless otherwise noted.
V
IN
= 3.6V
C
OUT
= 100µF
V
OUT
50V/DIV
AVERAGE
INPUT
CURRENT
0.5A/DIV
1s/DIV
3468 G03
V
IN
(V)
2
CHARGE TIME (s)
10
9
8
7
6
5
4
3
2
1
0
4
6
7
3468 G06
3
5
8
9
C
OUT
= 100µF
C
OUT
= 50µF
T
A
= 25°C
V
OUT
(V)
0 50 100 150 200 250 300
AVERAGE INPUT CURRENT (mA)
3468 G09
600
0
150
300
450
V
IN
= 2.8V
V
IN
= 4.2V
V
IN
= 3.6V
T
A
= 25°C
LT3468-2 Charge Time
LT3468-2 Charging Waveform
LT3468-2 Input Current