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LTM8042/LTM8042-1
TYPICAL PERFORMANCE CHARACTERISTICS
LTM8042
T A = 25°C, unless otherwise noted.
50
45
40
Junction Temperature Rise
vs Load, Buck-Boost Mode,
10.9V at 1A LED String
60
50
Junction Temperature Rise
vs Load, Buck-Boost Mode,
13.6V at 1A LED String
25
20
Junction Temperature Rise
vs Load, Buck-Boost Mode,
15.5V at 350mA LED String
35
30
12V IN
40
12V IN
16V IN
15
12V IN
25
20
15
30
20
10
10
5
0
10
0
5
0
0
200
400
600
800
1000
0
200
400
600
800
1000
0
50
100
150
200
250
300
350
LED CURRENT (mA)
80421 G35
LED CURRENT (mA)
80421 G36
LED CURRENT (mA)
80421 G37
LTM8042/LTM8042-1
RUN Pin Current vs Voltage
160
140
120
100
80
60
40
20
0
0
10
20
30
40
RUN VOLTAGE (V)
LTM8042-1
80421 G38
95
90
85
80
75
70
65
Efficiency vs V IN , Boost Operation,
6.7V at 350mA LED String
95
90
85
80
75
70
65
Efficiency vs V IN , Boost Operation,
9.7V at 350mA LED String
95
90
85
80
75
70
65
Efficiency vs V IN , Boost Operation,
12.6V at 350mA LED String
2
3
4
5
6
2.5
4.5
6.5
8.5
3
5
7
9
11
V IN (V)
80421 G39
V IN (V)
80421 G40
V IN (V)
80421 G41
80421fa
8
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