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LTM8042/LTM8042-1
APPLICATIONS INFORMATION
Table 5. LTM8042-1 Recommended Values and Configuration for Buck Mode (T A = 25°C)
LED
STRING
V IN RANGE
C IN
C OUT
VOLTAGE
(LED + TO
LED
R
f
(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)
4.3V to 8.3V
6.6V to 20V
9.5V to 31.5V
3V to 30V 1μF 0805 X7R 50V 1μF 1206 X7R 50V 2.2μF 1206 X7R 10V
3V to 30V 1μF 0805 X7R 50V 1μF 1206 X7R 50V 2.2μF 1206 X7R 10V
3V to 30V 1μF 0805 X7R 50V 1μF 1206 X7R 50V 2.2μF 1206 X7R 16V
2V to 4V
4V to 6V
6V to 9V
35mA
35mA
35mA
1.27k 86.6k 250k 86.6k 250k
1.27k 86.6k 250k 86.6k 250k
1.27k 86.6k 250k 86.6k 250k
12.5V to 33V
3V to 30V 1μF 0805 X7R 50V 1μF 1206 X7R 50V 2.2μF 1210 X7R 16V 8V to 12V
35mA
1.27k 86.6k 250k 86.6k 250k
16.6V to 33.2V 3V to 30V 1μF 0805 X7R 50V 1μF 1206 X7R 50V 2.2μF 1210 X7R 25V 12V to 16V
21.8V to 33.6V 3V to 30V 1μF 0805 X7R 50V 1μF 1206 X7R 50V 2.2μF 1210 X7R 25V 15V to 21V
24.4V to 33.1V 3V to 30V 1μF 0805 X7R 50V 1μF 1206 X7R 50V 2.2μF 1210 X7R 25V 18V to 24V
35mA
35mA
35mA
1.27k 86.6k 250k 46.4k 420k
1.27k 86.6k 250k 33.2k 550k
1.27k 86.6k 250k 26.1k 670k
4.3V to 19.5V
6.5V to 33.8V
9.6V to 34.5V
3V to 30V 1μF 0805 X7R 50V 1μF 1206 X7R 50V 4.7μF 1206 X7R 10V
3V to 30V 1μF 0805 X7R 50V 1μF 1206 X7R 50V 4.7μF 1206 X7R 10V
3V to 30V 1μF 0805 X7R 50V 1μF 1206 X7R 50V 4.7μF 1210 X7R 16V
2V to 4V
4V to 6V
6V to 9V
100mA
100mA
100mA
3.40k 86.6k 250k 86.6k 250k
3.40k 86.6k 250k 86.6k 250k
3.40k 76.8k 275k 57.6k 350k
12.6V to 34.4V 3V to 30V 1μF 0805 X7R 50V 1μF 1206 X7R 50V 4.7μF 1210 X7R 16V 8V to 12V
100mA
3.40k 69.8k 300k 48.7k 400k
17V to 34.5V
3V to 30V 1μF 0805 X7R 50V 1μF 1206 X7R 50V 4.7μF 1210 X7R 25V 12V to 16V
100mA
3.40k 37.4k 500k 31.6k 575k
22.8V to 34.5V 3V to 30V 1μF 0805 X7R 50V 1μF 1206 X7R 50V 4.7μF 1210 X7R 25V 15V to 21V
26.2V to 34.4V 3V to 30V 1μF 0805 X7R 50V 1μF 1206 X7R 50V 4.7μF 1210 X7R 25V 18V to 24V
100mA
100mA
3.40k 24.9k 700k 19.1k 870k
3.40k 21.0k 800k 12.4k 1.2M
4.6V to 34.3V
6.7V to 34.3V
3V to 30V 1μF 0805 X7R 50V 1μF 1206 X7R 50V 4.7μF 1206 X7R 10V
3V to 30V 1μF 0805 X7R 50V 1μF 1206 X7R 50V 4.7μF 1206 X7R 10V
2V to 4V
4V to 6V
350mA
350mA
19.6k 61.9k 330k 54.9k 365k
19.6k 30.1k 600k 24.9k 700k
10.3V to 34.3V 3V to 30V 1μF 0805 X7R 50V 1μF 1206 X7R 50V 4.7μF 1210 X7R 16V
6V to 9V
350mA
19.6k 21.0k 800k 15.8k
1M
13.7V to 34.5V 3V to 30V 1μF 0805 X7R 50V 1μF 1206 X7R 50V 4.7μF 1210 X7R 16V 8V to 12V
18.6V to 34.6V 3V to 30V 1μF 0805 X7R 50V 1μF 1206 X7R 50V 4.7μF 1210 X7R 25V 12V to 16V
350mA
350mA
19.6k 19.6k 850k 8.25k 1.6M
19.6k 14.0k 1.1M 3.74k 2.5M
24.1V to 34.3V 3V to 30V 1μF 0805 X7R 50V 1μF 1206 X7R 50V 4.7μF 1210 X7R 25V 15V to 21V
27.3V to 32.8V 3V to 30V 1μF 0805 X7R 50V 1μF 1206 X7R 50V 4.7μF 1210 X7R 25V 18V to 24V
350mA
350mA
19.6k 15.8k
19.6k 15.8k
1M
1M
3.74k 2.5M
3.74k 2.5M
80421fa
24
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