LTM8042/LTM8042-1
11
80421fb
For more information www.linear.com/LTM8042
Maximum LED Current vs Input
Voltage, Buck-Boost Mode
LED Current vs CTL Voltage
Quiescent Current vs Input
Voltage, Open LED
INPUT VOLTAGE (V)
0
0
MAXIMUM LED CURRENT (mA)
20
80421 G60
10 30 40
350
50
300
100
200
150
250
3.2V AT 350mA
6.3V AT 350mA
9.4V AT 350mA
12.4V AT 350mA
15.5V AT 350mA
18.6V AT 350mA
CTL VOLTAGE (mV)
0
0
400
100
80421 G61
800600200 1000 1200
40
20
60
80
INPUT VOLTAGE (V)
0
0
20105
70
80421 G62
302515 35
40
10
50
20
30
60
TYPICAL PERFORMANCE CHARACTERISTICS
Junction Temperature Rise
vs Load, Boost Operation,
6.8V at 350mA LED String
Junction Temperature Rise
vs Load, Boost Operation,
9.4V at 350mA LED String
LED CURRENT (mA)
0
0
20010050
80421 G63
300250150 350
4
1
2
3
5V
IN
Junction Temperature Rise
vs Load, Boost Operation,
11.2V at 350mA LED String
LED CURRENT (mA)
0
0
20010050
6
5
80421 G64
300250150 350
4
1
2
3
5V
IN
LED CURRENT (mA)
0
0
20010050
8
7
6
5
80421 G65
300250150 350
4
1
2
3
5V
IN
Junction Temperature Rise
vs Load, Boost Operation,
15.5V at 350mA LED String
LED CURRENT (mA)
0
0
TEMPERATURE (°C)
20010050
14
12
10
80421 G66
300250150 350
8
2
4
6
5V
IN
T
A
= 25°C, unless otherwise noted.
LTM8042-1
Junction Temperature Rise
vs Load, Buck Mode,
2.3V at 350mA LED String
Junction Temperature Rise
vs Load, Buck Mode,
3.2V at 350mA LED String
LED CURRENT (mA)
0
0
20010050
10
9
5
6
80421 G67
300250150 350
4
8
7
1
2
3
12V
IN
24V
IN
LED CURRENT (mA)
0
0
20010050
5
80421 G68
300250150 350
4
1
2
3
12V
IN
5V
IN