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LTM8042/LTM8042-1

80421fa

APPLICATIONS INFORMATION

Table 6. LTM8042-1 Recommended Values and Configuration for Buck-Boost Mode (TA = 25°C)

VIN RANGE

(BSTIN/

BKLED–)VCC

CVCC

(VCC TO GND)

CIN

(BSTIN/BKLED–

TO GND)

COUT1

(BSTOUT/BKIN

TO BSTIN/

BKLED–)

COUT2

(BSTOUT/BKIN

TO GND)

LED

STRING

VOLTAGE

(LED+ TO

BSTIN/

BKLED–)

LED

STRING

CUR-

RENT

RCTL

(OPTI-

MAL)

(OPTI-

MAL)

(MIN)

(MAX)

1V to 9.5V

3V to 30V 1μF 0805 X7R 50V 1μF 0805 X7R 10V 1μF 0805 X7R 10V 1μF 0805 X7R 10V

2V to 4V

35mA

1.27k 86.6k

250k

86.6k

250k

1.1V to 21V

3V to 30V 1μF 0805 X7R 50V 1μF 0805 X7R 16V 1μF 0805 X7R 10V 1μF 0805 X7R 10V

4V to 6V

35mA

1.27k 86.6k

250k

86.6k

250k

1.3V to 24V

3V to 30V 1μF 0805 X7R 50V 1μF 1206 X7R 25V 1μF 0805 X7R 10V 1μF 0805 X7R 10V

6V to 9V

35mA

1.27k 86.6k

250k

86.6k

250k

1.5V to 20.8V 3V to 30V 1μF 0805 X7R 50V 1μF 1206 X7R 25V 1μF 0805 X7R 16V 1μF 0805 X7R 16V 8V to 12V

35mA

1.27k 86.6k

250k

43.2k

450k

2.2V to 16.9V 3V to 30V 1μF 0805 X7R 50V 1μF 1206 X7R 25V 1μF 0805 X7R 16V 1μF 1206 X7R 25V 12V to 16V

35mA

1.27k 48.7k

400k

30.1k

600k

3V to 12V

3V to 30V 1μF 0805 X7R 50V 1μF 1206 X7R 25V 1μF 1206 X7R 25V 1μF 1206 X7R 25V 15V to 21V

35mA

1.27k 37.4k

500k

10.0k 1.4M

3.8V to 9V

3V to 30V 1μF 0805 X7R 50V 1μF 1206 X7R 25V 1μF 1206 X7R 25V 1μF 1206 X7R 25V 18V to 24V

35mA

1.27k 22.6k

750k

3.74k 2.5M

1.1V to 24V

3V to 30V 1μF 0805 X7R 50V 1μF 1206 X7R 25V 2.2μF 1206 X7R 10V 1μF 0805 X7R 10V

2V to 4V

100mA 3.40k 86.6k

250k

69.8k

300k

1.3V to 27V

3V to 30V 1μF 0805 X7R 50V 1μF 1206 X7R 25V 1μF 0805 X7R 10V 1μF 0805 X7R 10V

4V to 6V

100mA 3.40k 48.7k

400k

43.2k

450k

1.6V to 24V

3V to 30V 1μF 0805 X7R 50V 1μF 1206 X7R 25V 1μF 0805 X7R 10V 1μF 0805 X7R 10V

6V to 9V

100mA 3.40k 37.4k

500k

33.2k

550k

1.9V to 21.5V 3V to 30V 1μF 0805 X7R 50V 1μF 1206 X7R 25V 1μF 0805 X7R 16V 1μF 0805 X7R 16V 8V to 12V

100mA 3.40k 21.0k

800k

19.6k

850k

2.5V to 17V

3V to 30V 1μF 0805 X7R 50V 1μF 1206 X7R 25V 1μF 0805 X7R 16V 1μF 1206 X7R 25V 12V to 16V 100mA 3.40k 19.6k

850k

8.25k 1.6M

3V to 12V

3V to 30V 1μF 0805 X7R 50V 1μF 0805 X7R 16V 1μF 1206 X7R 25V 1μF 1206 X7R 25V 15V to 21V 100mA 3.40k 19.6k

850k

3.74k 2.5M

3.7V to 9V

3V to 30V 1μF 0805 X7R 50V 1μF 0805 X7R 10V 1μF 1206 X7R 25V 1μF 1206 X7R 25V 18V to 24V 100mA 3.40k 15.8k

3.74k 2.5M

2.2V to 29V

3V to 30V 1μF 0805 X7R 50V 1μF 1206 X7R 50V 2.2μF 1206 X7R 10V 1μF 0805 X7R 10V

2V to 4V

350mA 19.6k 43.2k

450k

37.4k

500k

2.7V to 27.5V 3V to 30V 1μF 0805 X7R 50V 1μF 1206 X7R 50V 2.2μF 1206 X7R 10V 1μF 0805 X7R 10V

4V to 6V

350mA 19.6k 27.4k

650k

18.2k

900k

3.7V to 23.8V 3V to 30V 1μF 0805 X7R 50V 1μF 1206 X7R 25V 2.2μF 1206 X7R 10V 1μF 0805 X7R 10V

6V to 9V

350mA 19.6k 18.2k

900k

9.09k 1.5M

3.8V to 20.2V 3V to 30V 1μF 0805 X7R 50V 1μF 1206 X7R 25V 2.2μF 1206 X7R 16V 1μF 0805 X7R 16V 8V to 12V

350mA 19.6k 14.0k

1.1M

6.19k 1.9M

5.3V to 15.2V 3V to 30V 1μF 0805 X7R 50V 1μF 1206 X7R 25V 2.2μF 1206 X7R 16V 1μF 1206 X7R 25V 12V to 16V 350mA 19.6k 14.0k

1.1M

3.74k 2.5M

7.4V to 9.3V 3V to 30V 1μF 0805 X7R 50V 1μF 0805 X7R 16V 2.2μF 1206 X7R 16V 1μF 1206 X7R 25V 15V to 21V 350mA 19.6k 18.2k

900k

3.74k 2.5M

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