Datasheet

4
LT1513/LT1513-2
sn1513 1513fas
TEMPERATURE (°C)
–50
–50
NEGATIVE FEEDBACK INPUT CURRENT (µA)
–30
0
0
50
75
LT1513 • G06
–40
–10
–20
–25 25
100
125
150
CHARGING CURRENT (A)
BATTERY VOLTAGE (V)
12
10
8
6
4
2
0
0.4 0.8 1.2 1.6
1513 G07
2.00.2
0
0.6 1.0 1.4 1.8
(A) 8.4V BATTERY
I
CHRG
= 0.5A
(B) 8.4V BATTERY
I
CHRG
= 1A
(C) 4.2V BATTERY
I
CHRG
= 1.5A
V
IN
= 12VMAXIMUM AVAILABLE
CHARGING CURRENT
WITH 12V INPUT
(A) (B)
(C)
Negative Feedback Input Current
vs Temperature
Output Charging Characteristics
Showing Constant-Current and
Constant-Voltage Operation
TEMPERATURE (°C)
–50
0
MINIMUM SYNCHRONIZATION VOLTAGE (V
P-P
)
0.5
1.0
1.5
2.0
050
100
150
LT1513 • G04
2.5
3.0
–25 25
75
125
f
SYNC
= 700kHz
Minimum Peak-to-Peak
Synchronization Voltage vs Temperature
TEMPERATURE (°C)
–50
FEEDBACK INPUT CURRENT (nA)
400
500
600
150
LT1513 • G05
300
200
0
0
50
100
100
800
700
–25
25
75
125
V
FB
= V
REF
Feedback Input Current
vs Temperature
TYPICAL PERFORMANCE CHARACTERISTICS
U
W
Switch Saturation Voltage
vs Switch Current
Minimum Input Voltage
vs Temperature
Switch Current Limit
vs Duty Cycle
TEMPERATURE (°C)
–50
1.8
INPUT VOLTAGE (V)
2.0
2.2
2.4
2.6
050
100
150
LT1513 • G03
2.8
3.0
–25 25
75
125
DUTY CYCLE (%)
0
SWITCH CURRENT LIMIT (A)
2
4
6
1
3
5
20 40 60 80
LT1513 • G02
10010
0
30 50 70 90
25°C AND
125°C
–55°C
SWITCH CURRENT (A)
0
SWITCH SATURATION VOLTAGE (V)
0.6
0.8
1.0
3.2
LT1513 • G01
0.4
0.2
0.5
0.7
0.9
0.3
0.1
0
0.8
1.6
2.4
4.0
2.8
0.4
1.2
2.0
3.6
100°C
150°C
25°C
–55°C