4

LTC3718

3718fa

TYPICAL PERFOR A CE CHARACTERISTICS

Boost Converter Oscillator

Frequency vs Temperature

Boost Converter Current Limit

vs Duty Cycle

TEMPERATURE (

°C)

–50

–25

0

25

50

75

100

3718 G01

2.00

1.75

1.50

1.25

1.00

0.75

0.50

0.25

0

SHDN PIN VOLTAGE (V)

012345

3718 G02

50

40

30

20

10

0

DUTY CYCLE (%)

10

20

30

40

50

60

70

80

3718 G03

1000

900

800

700

600

500

400

300

200

70

°C

25

°C

–40

°C

TEMPERATURE (

°C)

–50

3718 G04

1.25

1.24

1.23

1.22

1.21

1.20

FIGURE 1 CIRCUIT

–25

0

25

50

75

100

ELECTRICAL CHARACTERISTICS

Note 1: Absolute Maximum Ratings are those values beyond which the life

of a device may be impaired.

Note 4: The LTC3718 is guaranteed to meet performance specifications

from 0

°C to 70°C. Specifications over the –40°C to 85°C operating

temperature range are assured by design, characterization and correlation

with statistical process controls.

Note 5: Current limit guaranteed by design and/or correlation to static test.

INPUT VOLTAGE (V)

1.5

1.7

1.9

2.1

2.3

2.5

2.7

2.9

3718 G06

50.00

49.95

49.90

49.85

49.80

49.75

49.70

49.65

LOAD = 0A

LOAD = 10A

FIGURE 1 CIRCUIT

LOAD = 1A

LOAD CURRENT (A)

100

90

80

70

60

50

40

30

20

10

0

0.01

1

10

100

3718 G05/TA01a

0.1

FIGURE 1 CIRCUIT

Efficiency vs Load Current

Voltage