Datasheet

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