Datasheet

LTM8042/LTM8042-1
24
80421fa
APPLICATIONS INFORMATION
Table 5. LTM8042-1 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
R
(OPTI-
MAL)
f
(OPTI-
MAL)
RT
(MIN)
f
(MAX)
4.3V to 8.3V 3V to 30V 1µF 0805 X7R 50V 1µF 1206 X7R 50V 2.2µF 1206 X7R 10V 2V to 4V 35mA 1.27k 86.6k 250k 86.6k 250k
6.6V to 20V 3V to 30V 1µF 0805 X7R 50V 1µF 1206 X7R 50V 2.2µF 1206 X7R 10V 4V to 6V 35mA 1.27k 86.6k 250k 86.6k 250k
9.5V to 31.5V 3V to 30V 1µF 0805 X7R 50V 1µF 1206 X7R 50V 2.2µF 1206 X7R 16V 6V to 9V 35mA 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 35mA 1.27k 86.6k 250k 46.4k 420k
21.8V to 33.6V 3V to 30V 1µF 0805 X7R 50V 1µF 1206 X7R 50V 2.2µF 1210 X7R 25V 15V to 21V 35mA 1.27k 86.6k 250k 33.2k 550k
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 1.27k 86.6k 250k 26.1k 670k
4.3V to 19.5V 3V to 30V 1µF 0805 X7R 50V 1µF 1206 X7R 50V 4.7µF 1206 X7R 10V 2V to 4V 100mA 3.40k 86.6k 250k 86.6k 250k
6.5V to 33.8V 3V to 30V 1µF 0805 X7R 50V 1µF 1206 X7R 50V 4.7µF 1206 X7R 10V 4V to 6V 100mA 3.40k 86.6k 250k 86.6k 250k
9.6V to 34.5V 3V to 30V 1µF 0805 X7R 50V 1µF 1206 X7R 50V 4.7µF 1210 X7R 16V 6V to 9V 100mA 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 100mA 3.40k 24.9k 700k 19.1k 870k
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 3.40k 21.0k 800k 12.4k 1.2M
4.6V to 34.3V 3V to 30V 1µF 0805 X7R 50V 1µF 1206 X7R 50V 4.7µF 1206 X7R 10V 2V to 4V 350mA 19.6k 61.9k 330k 54.9k 365k
6.7V to 34.3V 3V to 30V 1µF 0805 X7R 50V 1µF 1206 X7R 50V 4.7µF 1206 X7R 10V 4V to 6V 350mA 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 350mA 19.6k 19.6k 850k 8.25k 1.6M
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 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 350mA 19.6k 15.8k 1M 3.74k 2.5M
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 19.6k 15.8k 1M 3.74k 2.5M