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LTM8042/LTM8042-1
APPLICATIONS INFORMATION
Table 3. LTM8042 Recommended Values and Configuration for Buck-Boost Mode (T A = 25°C)
LED
STRING
V IN
RANGE
(BSTIN/
BKLED – )
V CC
CV CC
(V CC to GND)
C IN
(BSTIN/BKLED –
TO GND)
C OUT1
(BSTOUT/BKIN
TO BSTIN/
BKLED – )
C OUT2
(BSTOUT/BKIN
TO GND)
VOLTAGE LED
(LED + to STRING RT f
BSTIN/ CURR- (OPTI- (OPTI- RT f
BKLED – ) ENT R CTL MAL) MAL) (MIN) (MAX)
3V to 6V
3V to 14V
3V to 20V
3V to 21V
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 10V
1μF 0805 X7R 16V
1μF 1206 X7R 25V
1μF 1206 X7R 25V
1μF 0805 X7R 10V
1μF 0805 X7R 10V
1μF 0805 X7R 10V
1μF 0805 X7R 16V
1μF 0805 X7R 10V
1μF 0805 X7R 10V
1μF 0805 X7R 10V
1μF 0805 X7R 16V
2V to 4V
4V to 6V
6V to 9V
8V to 12V
35mA
35mA
35mA
35mA
523
523
523
523
86.6k
86.6k
86.6k
86.6k
250k
250k
250k
250k
86.6k
86.6k
86.6k
57.6k
250k
250k
250k
350k
3V to 17.8V
3V to 13V
3.5V to 10.1V
3V to 30V
3V to 30V
3V to 30V
1μF 0805 X7R 50V
1μF 0805 X7R 50V
1μF 0805 X7R 50V
1μF 1206 X7R 25V
1μF 0805 X7R 16V
1μF 0805 X7R 16V
1μF 0805 X7R 16V
1μF 1206 X7R 25V
1μF 1206 X7R 25V
1μF 1206 X7R 25V 12V to 16V
1μF 1206 X7R 25V 15V to 21V
1μF 1206 X7R 25V 18V to 24V
35mA
35mA
35mA
523
523
523
48.7k
37.4k
22.6k
400k
500k
750k
27.4k
10.0k
3.74k
650k
1.4M
2.5M
3V to 21V
3V to 30V
1μF 0805 X7R 50V
1μF 1206 X7R 25V 2.2μF 1206 X7R 10V 1μF 0805 X7R 10V
2V to 4V
100mA 1.30k 86.6k
250k
69.8k
300k
3V to 22.8V
3V to 23.4V
3V to 21.8V
3V to 30V
3V to 30V
3V to 30V
1μF 0805 X7R 50V
1μF 0805 X7R 50V
1μF 0805 X7R 50V
1μF 1206 X7R 25V
1μF 1206 X7R 25V
1μF 1206 X7R 25V
1μF 0805 X7R 10V
1μF 0805 X7R 10V
1μF 0805 X7R 16V
1μF 0805 X7R 10V
1μF 0805 X7R 10V
1μF 1206 X7R 25V
4V to 6V
6V to 9V
8V to 12V
100mA 1.30k 48.7k
100mA 1.30k 37.4k
100mA 1.30k 21.0k
400k
500k
800k
43.2k
30.1k
16.9k
450k
600k
950k
3V to 17.9V
3V to 12.6V
3.7V to 9.7V
3V to 30V
3V to 30V
3V to 30V
1μF 0805 X7R 50V
1μF 0805 X7R 50V
1μF 0805 X7R 50V
1μF 1206 X7R 25V
1μF 0805 X7R 16V
1μF 0805 X7R 10V
1μF 0805 X7R 16V
1μF 1206 X7R 25V
1μF 1206 X7R 25V
1μF 1206 X7R 25V 12V to 16V 100mA 1.30k 19.6k
1μF 1206 X7R 25V 15V to 21V 100mA 1.30k 19.6k
1μF 1206 X7R 25V 18V to 24V 100mA 1.30k 19.6k
850k
850k
850k
11.0k
4.02k
3.74k
1.3M
2.4M
2.5M
3V to 28V
3V to 27.5V
3V to 30V
3V to 30V
1μF 0805 X7R 50V
1μF 0805 X7R 50V
1μF 1206 X7R 50V 2.2μF 1206 X7R 10V 1μF 0805 X7R 10V
1μF 1206 X7R 50V 2.2μF 1206 X7R 10V 1μF 0805 X7R 10V
2V to 4V
4V to 6V
350mA 4.75k 43.2k
350mA 4.75k 33.2k
450k
550k
37.4k
24.9k
500k
700k
4.5V to 24.5V
3V to 30V
1μF 0805 X7R 50V
1μF 1206 X7R 25V 2.2μF 1206 X7R 10V 1μF 0805 X7R 10V
6V to 9V
350mA 4.75k 24.9k
700k
10.7k 1.35M
5.5V to 20.7V
3V to 30V
1μF 0805 X7R 50V
1μF 1206 X7R 25V 2.2μF 1206 X7R 16V 1μF 1206 X7R 25V
8V to 12V
350mA 4.75k 15.8k
1M
6.19k
1.9M
7V to 17.1V
8.2V to 11.4V
3V to 30V
3V to 30V
1μF 0805 X7R 50V
1μF 0805 X7R 50V
1μF 1206 X7R 25V 2.2μF 1206 X7R 16V 1μF 1206 X7R 25V 12V to 16V 350mA 4.75k 15.8k
1μF 0805 X7R 16V 4.7μF 1210 X7R 25V 1μF 1206 X7R 25V 15V to 21V 350mA 4.75k 18.2k
1M
900k
3.74k
3.74k
2.5M
2.5M
3V to 23V
4.5V to 27V
6V to 24V
3V to 30V
3V to 30V
3V to 30V
1μF 0805 X7R 50V
1μF 0805 X7R 50V
1μF 0805 X7R 50V
1μF 1206 X7R 25V 2.2μF 1206 X7R 10V 1μF 0805 X7R 10V
1μF 1206 X7R 50V 2.2μF 1206 X7R 10V 1μF 0805 X7R 10V
1μF 1206 X7R 25V 2.2μF 1206 X7R 10V 1μF 0805 X7R 10V
2V to 4V
4V to 6V
6V to 9V
500mA 7.32k 27.4k
500mA 7.32k 21.0k
500mA 7.32k 15.8k
650k
800k
1M
24.9k
19.6k
10.0k
700k
850k
1.4M
7.3V to 20.3V
3V to 30V
1μF 0805 X7R 50V
1μF 1206 X7R 25V 2.2μF 1206 X7R 16V 1μF 1206 X7R 25V
8V to 12V
500mA 7.32k 15.8k
1M
6.34k 1.85M
9.4V to 15V
3V to 30V
1μF 0805 X7R 50V
1μF 0805 X7R 16V 2.2μF 1206 X7R 16V 1μF 1206 X7R 25V 12V to 16V 500mA 7.32k 15.8k
1M
3.74k
2.5M
4.2V to 23.8V
4.7V to 27V
6.1V to 23V
7.3V to 20V
3V to 30V
3V to 30V
3V to 30V
3V to 30V
1μF 0805 X7R 50V 2.2μF 1206 X7R 25V 2.2μF 1206 X7R 10V 1μF 0805 X7R 10V
1μF 0805 X7R 50V 2.2μF 1206 X7R 50V 2.2μF 1206 X7R 10V 1μF 0805 X7R 10V
1μF 0805 X7R 50V 2.2μF 1206 X7R 25V 2.2μF 1206 X7R 10V 1μF 0805 X7R 10V
1μF 0805 X7R 50V 2.2μF 1206 X7R 25V 2.2μF 1206 X7R 16V 1μF 1206 X7R 25V
2V to 4V
4V to 6V
6V to 9V
8V to 12V
700mA 11.8k 24.9k
700mA 11.8k 16.9k
700mA 11.8k 16.9k
700mA 11.8k 16.9k
700k
950k
950k
950k
22.6k
15.8k
9.09k
6.19k
750k
1M
1.5M
1.9M
10.5V to 16.5V
3V to 30V
1μF 0805 X7R 50V 2.2μF 1206 X7R 25V 4.7μF 1210 X7R 16V 1μF 1206 X7R 25V 12V to 16V 700mA 11.8k 15.8k
1M
3.74k
2.5M
4.7V to 28.5V
6.7V to 26.8V
9V to 23.5V
13.5V to 20V
3V to 30V
3V to 30V
3V to 30V
3V to 30V
1μF 0805 X7R 50V 2.2μF 1206 X7R 50V 4.7μF 1206 X7R 10V 1μF 0805 X7R 10V
1μF 0805 X7R 50V 2.2μF 1206 X7R 50V 4.7μF 1206 X7R 10V 1μF 0805 X7R 10V
1μF 0805 X7R 50V 4.7μF 1210 X7R 25V 4.7μF 1206 X7R 10V 1μF 0805 X7R 10V
1μF 0805 X7R 50V 4.7μF 1210 X7R 25V 4.7μF 1210 X7R 16V 1μF 1206 X7R 25V
2V to 4V
4V to 6V
6V to 9V
8V to 12V
1A
1A
1A
1A
Open 24.9k
Open 22.6k
Open 22.6k
Open 22.6k
700k
750k
750k
750k
22.6k
16.9k
10.0k
5.76k
750k
950k
1.4M
2M
80421fa
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