LTC3721-1 datasheet(4/26 Pages) LINER

Part #	LTC3721-1

Description	Secondary-Side Opto-Coupler Driver Ground-Referenced Opto-Coupler Drive

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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4 / 26 page

LT4430

4

4430fb

TYPICAL PERFORMANCE CHARACTERISTICS

Feedback Reference Voltage

vs Temperature

FB Voltage Line Regulation

FB Input Bias Current

vs Temperature

TEMPERATURE (°C)

–75 –50

0.594

0.595

0.596

0.598

0.600

0.602

050

100

150

4430 G03

0.604

0.597

0.599

0.601

0.603

0.605

0.606

–25

25

75

125

VIN (V)

0

0.5990

0.5995

0.6000

0.6005

48

12

20

4430 G04

0.6010

26

10

14 16 18

TA = 25°C

TEMPERATURE (°C)

–75 –50

–200

–175

–150

–100

–50

0

050

100

150

4430 G05

–125

–75

–25

25

50

–25

25

75

125

OC Charging Current

vs Input Voltage

OC Charging Current

vs Temperature

OC Clamp Voltage

vs Temperature

OC Ampliﬁer Offset Voltage

vs Temperature

VIN (V)

0

510

15

4430 G06

20

15

13

11

9

7

5

TEMPERATURE (°C)

–75 –50

5

7

9

11

13

050

100

150

4430 G07

15

–25

25

75

125

VIN = 5V

TEMPERATURE (°C)

–75 –50

0.5

0.7

0.9

1.1

1.3

050

100

150

4430 G08

1.5

–25

25

75

125

TEMPERATURE (°C)

–75 –50

0

10

20

40

60

80

050

100

150

4430 G09

30

50

70

90

100

–25

25

75

125

Quiescent Current vs Temperature

Undervoltage Lockout Threshold

vs Temperature

TEMPERATURE (°C)

–50

–75

1.0

1.5

2.0

2.5

3.0

050

100

150

4430 G01

3.5

4.0

–25

25

75

125

VIN = 3V

VIN = 20V

TEMPERATURE (°C)

–75 –50

1.0

1.5

2.0

2.5

050

100

150

4430 G02

3.0

–25

25

75

125

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