Datasheet

LT3650-4.1/LT3650-4.2
5
36504142fc
V
BAT
(V)
0
–0.4
I
BAT
(mA)
0.0
0.4
0.8
2.2
1.6
1
2
2.5
2.0
1.2
–0.2
0.2
0.6
1.0
1.8
1.4
0.5 1.5
3
3.5
4
4.5
365042 G11
LT3650-4.2
I
SW
(A)
0
I
SW
/I
BOOST
18
24
30
36
1.6
12
6
0
21
27
33
15
9
3
0.4
0.8
1.2
0.2 1.8
0.6
1.0
1.4
2.0
365042 G04
TEMPERATURE (°C)
–50
320
SWITCH FORWARD DROP (mV)
340
360
380
480
420
0
50
75
365042 G05
440
460
400
–25
25
100
125
I
SW
= 2A
Switch Drive (I
SW
/I
BOOST
)
vs I
SW
Switch Forward Drop (V
IN
– V
SW
)
vs Temperature
TEMPERATURE (°C)
–50
99.0
V
SENSE
–
V
BAT
(mV)
99.2
99.6
99.8
100.0
101.0
100.4
0
50
75
365042 G09
99.4
100.6
100.8
100.2
–25
25
100
125
V
BAT
= 3.5V
TEMPERATURE (°C)
–50
8
V
SENSE
–
V
BAT
(mV)
9
10
11
12
0
50
75
365042 G07
–25
25
100
125
TEMPERATURE (°C)
0
V
SENSE
– V
BAT
(mV)
40
80
20
60
100
120
45 65 85 105 125
35 13525 55 75 95 115
365042 G10
Typical perForMance characTerisTics
I
MAX
Current Limit (V
SENSE
– V
BAT
)
vs Temperature
C/10 Threshold (V
SENSE
– V
BAT
)
vs Temperature
CC/CV Charging; SENSE Pin Bias
Current vs V
SENSE
Thermal Foldback – I
MAX
Current Limit (V
SENSE
– V
BAT
)
vs Temperature
TEMPERATURE (°C)
–50
49.0
V
CLP
–
V
IN
(mV)
49.2
49.6
49.8
50.0
51.0
50.4
0
50
75
365042 G08
49.4
50.6
50.8
50.2
–25
25
100
125
CLP Input Limit Threshold
(V
CLP
– V
IN
) vs Temperature,
I
CHG
at 50%
CC/CV Charging; BAT Pin Bias
Current vs V
BAT
Battery Bias Current with Charger
Disabled (I
BAT
+ I
SENSE
+ I
BOOST
+ I
SW
)
V
SENSE
(V)
0
–350
I
SENSE
(µA)
–250
–150
–50
100
1
2
2.5
50
–300
–200
–100
0
0.5 1.5
3
3.5
4
4.5
365042 G06
LT3650-4.2
T
A
= 25°C, unless otherwise noted.
V
IN
= 20V, V
SHDN
= 0V
V
IN
FLOATING
V
BAT
(V)
0
BATTERY CURRENT (µA)
2.0
4.5
5.0
1.0 2.0 3.0
1.0
3.5
1.5
4.0
0.5
0
3.0
2.5
0.5 1.5 4.0 4.52.5 3.5
365042 G12