LT3743IUFDPBF datasheet(5/28 Pages) LINER

Part #	LT3743IUFDPBF

Description	High Current Synchronous Step-Down LED Driver with Three-State Control

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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LT3743

5

3743f

TYPICAL PERFORMANCE CHARACTERISTICS

EN/UVLO Threshold (Falling)

EN/UVLO Pin Current

IQ in Shutdown

VIN (V)

6

1.58

1.64

1.70

30

–50°C

130°C

3743 G01

1.52

1.46

1.40

12

18

24

36

VIN (V)

6

8

10

30

3743 G02

4

2

0

12

18

24

36

25°C

130°C

–50°C

VIN (V)

0

0.3

0.4

0.5

32

3743 G03

0.2

0.1

0

8

16

24

40

130°C

25°C

Quiescent Current (Non-Switching)

VREF Pin Voltage

VREF Current Limit

VIN (V)

6

1.2

1.6

2.0

30

3743 G04

0.8

0.4

0

12

18

24

36

TA = 25°C

TA = 130°C

TA = –50°C

TEMPERATURE (°C)

–50

2.00

2.01

2.02

90

3743 G05

1.99

1.98

1.97

–15

20

55

125

VIN = 36V

VIN = 6V

VIN (V)

6

1.2

1.4

1.6

30

3743 G06

1.0

0.8

12

18

24

36

TA = 25°C

TA = 130°C

TA = –50°C

Oscillator Frequency

RT Pin Current Limit

Soft-Start Pin Current

TEMPERATURE (°C)

–50

0.9

1.2

1.5

90

3743 G07

0.6

0.3

0

–15

20

55

125

1.2MHz

900kHz

220kHz

TEMPERATURE (°C)

–50

70

80

90

3743 G08

60

50

40

–15

20

55

125

TEMPERATURE (°C)

–50

5

6

7

90

3743 G09

4

3

–15

20

55

125

VIN = 36V

VIN = 6V

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LT3743IUFDPBF Datasheet(PDF) 5 Page - Linear Technology

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