Datasheet

LTM8042/LTM8042-1
10
80421fa
TYPICAL PERFORMANCE CHARACTERISTICS
Maximum LED Current vs Input
Voltage, Boost Operation
Maximum LED Current vs Input
Voltage, Buck Mode
Efficiency vs V
IN
, Buck-Boost
Mode, 6.7V at 350mA LED String
Efficiency vs V
IN
, Buck-Boost
Mode, 9.7V at 350mA LED String
Efficiency vs V
IN
, Buck-Boost
Mode, 12.6V at 350mA LED String
INPUT VOLTAGE (V)
0
0
MAXIMUM LED CURRENT (mA)
2015
400
80421 G58
10525
300
350
200
50
250
100
150
6.3V AT 350mA
15.5V AT 350mA
18.6V AT 350mA
21.7V AT 350mA
24.8V AT 350mA
INPUT VOLTAGE (V)
0
0
MAXIMUM LED CURRENT (mA)
20
400
80421 G59
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
Efficiency vs V
IN
, Buck-Boost
Mode, 3.7V at 350mA LED String
T
A
= 25°C, unless otherwise noted.
LTM8042-1
Efficiency vs V
IN
, Buck Mode,
18.6V at 350mA LED String
Efficiency vs V
IN
, Buck-Boost
Mode, 15.6V at 350mA LED String
Efficiency vs V
IN
, Buck-Boost
Mode, 18.6V at 350mA LED String
V
IN
(V)
21
85
EFFICIENCY (%)
97
80421 G51
23 2725 29 31 33
89
87
93
91
95
V
IN
(V)
0
0
EFFICIENCY (%)
90
80421 G52
10 20 30 40
40
20
70
60
30
10
50
80
V
IN
(V)
0
40
EFFICIENCY (%)
90
80421 G53
10 205152530
60
50
75
85
70
55
45
65
80
V
IN
(V)
0
50
EFFICIENCY (%)
90
80421 G54
10 205152530
60
75
85
70
55
65
80
V
IN
(V)
0
60
EFFICIENCY (%)
90
80421 G55
10 2051525
75
85
70
65
80
V
IN
(V)
0
70
EFFICIENCY (%)
88
80421 G56
10 15 20
76
86
74
72
82
80
78
84
V
IN
(V)
5
75
EFFICIENCY (%)
87
80421 G57
11 1379 15
77
85
81
79
83