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LTM8042/LTM8042-1
APPLICATIONS INFORMATION
Table 2. LTM8042 Recommended Values and Configuration for Buck Mode (T A = 25°C)
LED STRING
C IN
C OUT
VOLTAGE
(LED + TO
LED
RT
f
V IN RANGE
(BSTOUT/BKIN)
V CC
CV CC
(BSTOUT/BKIN
TO GND)
(BSTOUT/BKIN TO
BSTIN/BKLED – )
BSTIN/
BKLED – )
STRING (OPTI- (OPTI- RT f
CURRENT R CTL MAL) MAL) (MIN) (MAX)
4.4V to 5.5V
3V to 30V
1μF 0805 X7R 50V
1μF 1206 X7R 50V
2.2μF 1206 X7R 10V 2V to 4V 35mA 523 86.6k 250k 86.6k 250k
6.8V to 14V
9.6V to 26V
12.5V to 33V
16.6V to 33V
21.8V to 33V
24.5V to 33V
3V to 30V
3V to 30V
3V to 30V
3V to 30V
3V to 30V
3V to 30V
1μF 0805 X7R 50V
1μF 0805 X7R 50V
1μF 0805 X7R 50V
1μF 0805 X7R 50V
1μF 0805 X7R 50V
1μF 0805 X7R 50V
1μF 1206 X7R 50V
1μF 1206 X7R 50V
1μF 1206 X7R 50V
1μF 1206 X7R 50V
1μF 1206 X7R 50V
1μF 1206 X7R 50V
2.2μF 1206 X7R 10V
2.2μF 1206 X7R 16V
2.2μF 1210 X7R 16V
2.2μF 1210 X7R 25V
2.2μF 1210 X7R 25V
2.2μF 1210 X7R 25V
4V to 6V
6V to 9V
8V to 12V
12V to 16V
15V to 21V
18V to 24V
35mA
35mA
35mA
35mA
35mA
35mA
523
523
523
523
523
523
86.6k 250k 86.6k 250k
86.6k 250k 86.6k 250k
86.6k 250k 86.6k 250k
86.6k 250k 46.4k 420k
86.6k 250k 33.2k 550k
86.6k 250k 26.1k 670k
4.5V to 21V
6.8V to 33.8V
9.9V to 33.5V
13V to 33.4V
3V to 30V
3V to 30V
3V to 30V
3V to 30V
1μF 0805 X7R 50V
1μF 0805 X7R 50V
1μF 0805 X7R 50V
1μF 0805 X7R 50V
1μF 1206 X7R 50V
1μF 1206 X7R 50V
1μF 1206 X7R 50V
1μF 1206 X7R 50V
4.7μF 1206 X7R 10V
4.7μF 1206 X7R 10V
4.7μF 1210 X7R 16V
4.7μF 1210 X7R 16V
2V to 4V
4V to 6V
6V to 9V
8V to 12V
100mA
100mA
100mA
100mA
1.30k 86.6k 250k 86.6k 250k
1.30k 86.6k 250k 86.6k 250k
1.30k 76.8k 275k 69.8k 300k
1.30k 69.8k 300k 48.7k 400k
17.2V to 33.1V 3V to 30V
1μF 0805 X7R 50V
1μF 1206 X7R 50V
4.7μF 1210 X7R 25V
12V to 16V
100mA
1.30k 37.4k 500k 31.6k 575k
23V to 33V
26V to 33V
5.2V to 33.6V
7V to 33.4V
3V to 30V
3V to 30V
3V to 30V
3V to 30V
1μF 0805 X7R 50V
1μF 0805 X7R 50V
1μF 0805 X7R 50V
1μF 0805 X7R 50V
1μF 1206 X7R 50V
1μF 1206 X7R 50V
1μF 1206 X7R 50V
1μF 1206 X7R 50V
4.7μF 1210 X7R 25V
4.7μF 1210 X7R 25V
4.7μF 1206 X7R 10V
4.7μF 1206 X7R 10V
15V to 21V
18V to 24V
2V to 4V
4V to 6V
100mA
100mA
350mA
350mA
1.30k 24.9k 700k 19.1k 870k
1.30k 21.0k 800k 12.4k 1.2M
4.75k 61.9k 330k 54.9k 365k
4.75k 30.1k 600k 24.9k 700k
10.5V to 33.3V 3V to 30V
1μF 0805 X7R 50V
1μF 1206 X7R 50V
4.7μF 1210 X7R 16V
6V to 9V
350mA
4.75k 21.0k 800k 15.8k
1M
14.5V to 33.2V 3V to 30V
1μF 0805 X7R 50V
1μF 1206 X7R 50V
4.7μF 1210 X7R 16V
8V to 12V
350mA
4.75k 12.4k 1.2M 8.25k 1.6M
19.2V to 33V
25V to 33V
4.9V to 33V
7.3V to 33.2V
3V to 30V
3V to 30V
3V to 30V
3V to 30V
1μF 0805 X7R 50V
1μF 0805 X7R 50V
1μF 0805 X7R 50V
1μF 0805 X7R 50V
1μF 1206 X7R 50V
1μF 1206 X7R 50V
1μF 1206 X7R 50V
1μF 1206 X7R 50V
4.7μF 1210 X7R 25V
4.7μF 1210 X7R 25V
4.7μF 1206 X7R 10V
4.7μF 1206 X7R 10V
12V to 16V
15V to 21V
2V to 4V
4V to 6V
350mA
350mA
500mA
500mA
4.75k 11.0k 1.3M 3.74k 2.5M
4.75k 11.0k 1.3M 3.74k 2.5M
7.32k 37.4k 500k 33.2k 550k
7.32k 21.0k 800k 18.2k 900k
10.7V to 33V
3V to 30V
1μF 0805 X7R 50V
1μF 1206 X7R 50V
4.7μF 1210 X7R 16V
6V to 9V
500mA
7.32k 15.8k
1M
11.0k 1.3M
14.1V to 32.8V 3V to 30V
18.5V to 32.5V 3V to 30V
24.3V to 32.5V 3V to 30V
1μF 0805 X7R 50V
1μF 0805 X7R 50V
1μF 0805 X7R 50V
1μF 1206 X7R 50V
1μF 1206 X7R 50V
1μF 1206 X7R 50V
4.7μF 1210 X7R 16V
4.7μF 1210 X7R 25V
4.7μF 1210 X7R 25V
8V to 12V
12V to 16V
15V to 21V
500mA
500mA
500mA
7.32k 15.8k
7.32k 15.8k
7.32k 15.8k
1M
1M
1M
7.50k 1.7M
3.74 2.5M
3.74k 2.5M
5V to 33.2V
7.3V to 32.7V
3V to 30V
3V to 30V
1μF 0805 X7R 50V
1μF 0805 X7R 50V
1μF 1206 X7R 50V
1μF 1206 X7R 50V
4.7μF 1206 X7R 10V
4.7μF 1206 X7R 10V
2V to 4V
4V to 6V
700mA
700mA
11.8k 33.2k 550k 30.1k 600k
11.8k 21.0k 800k 18.2k 900k
10.8V to 32.7V 3V to 30V
14.4V to 32.2V 3V to 30V
18.8V to 31.7V 3V to 30V
24.3V to 31.8V 3V to 30V
1μF 0805 X7R 50V
1μF 0805 X7R 50V
1μF 0805 X7R 50V
1μF 0805 X7R 50V
1μF 1206 X7R 50V
1μF 1206 X7R 50V
1μF 1206 X7R 50V
1μF 1206 X7R 50V
4.7μF 1210 X7R 16V
4.7μF 1210 X7R 16V
4.7μF 1210 X7R 25V
4.7μF 1210 X7R 25V
6V to 9V
8V to 12V
12V to 16V
15V to 21V
700mA
700mA
700mA
700mA
11.8k 15.8k
11.8k 15.8k
11.8k 15.8k
11.8k 15.8k
1M
1M
1M
1M
11.0k 1.3M
7.50k 1.7M
3.74k 2.5M
3.74k 2.5M
5V to 32V
7.2V to 32V
3V to 30V
3V to 30V
1μF 0805 X7R 50V
1μF 0805 X7R 50V
2.2μF 1206 X7R 50V
2.2μF 1206 X7R 50V
4.7μF 1206 X7R 10V
4.7μF 1206 X7R 10V
2V to 4V
4V to 6V
1A
1A
Open 33.2k 550k 30.1k 600k
Open 21.0k 800k 16.9k 950k
10.8V to 31V
3V to 30V
1μF 0805 X7R 50V
2.2μF 1206 X7R 50V
4.7μF 1210 X7R 16V
6V to 9V
1A
Open 15.8k
1M
11.0k 1.3M
14.3V to 30.5V 3V to 30V 1μF 0805 X7R 50V 2.2μF 1206 X7R 50V 4.7μF 1210 X7R 16V 8V to 12V
18.9V to 30.5V 3V to 30V 1μF 0805 X7R 50V 2.2μF 1206 X7R 50V 4.7μF 1210 X7R 25V 12V to 16V
24.6V to 30.5V 3V to 30V 1μF 0805 X7R 50V 2.2μF 1206 X7R 50V 4.7μF 1210 X7R 25V 15V to 21V
1A
1A
1A
Open 15.8k
Open 15.8k
Open 15.8k
1M
1M
1M
7.50k 1.7M
3.74k 2.5M
3.74k 2.5M
80421fa
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