LTC4441 查看數據表（PDF） - Linear Technology

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LTC4441

N-Channel MOSFET Gate Driver

Linear Technology 

LTC4441/LTC4441-1

Electrical Characteristics

Note 3: Failure to solder the Exposed Pad of the MSE package to the PC

board will result in a thermal resistance much higher than 38°C/W.

Note 4: Supply current in normal operation is dominated by the current

needed to charge and discharge the external power MOSFET gate. This

current will vary with supply voltage, switching frequency and the external

MOSFETs used.

Note 5: Rise and fall times are measured using 10% and 90% levels.

Delay times are measured from 50% of input to 20%/80% levels at driver

output.

Note 6: Blanking time is measured from 50% of OUT leading edge to 10%

of BLANK with a 1kΩ pull-up at BLANK pin. LTC4441 only.

Note 7: Guaranteed by design, not subject to test.

Note 8: This IC includes overtemperature protection that is intended to

protect the device during momentary overload conditions. The junction

temperature will exceed 125°C when overtemperature protection is active.

Continuous operation above the maximum operating junction temperature

may impair device reliability.

Typical Performance Characteristics

IN Pin Low Threshold Voltage

vs Temperature

1.8

VIN = 7.5V

1.7 DRVCC = 5V

1.6

1.5

1.4

1.3

1.2

1.1

1.0

–75 –50 –25 0 25 50 75 100 125

TEMPERATURE (°C)

4441 G01

FB Pin UVLO Threshold

vs Temperature

1.20

VIN = 7.5V

1.16

1.12

RISING EDGE

1.08

1.04

1.00

FALLING EDGE

0.96

0.92

0.88

0.84

–75 –50 –25 0 25 50 75 100 125

TEMPERATURE (°C)

4441 G04

IN Pin High Threshold Voltage

vs Temperature

2.8

VIN = 7.5V

2.7 DRVCC = 5V

2.6

2.5

2.4

2.3

2.2

2.1

2.0

–75 –50 –25 0 25 50 75 100 125

TEMPERATURE (°C)

4441 G02

SD Pin Input Threshold Voltage

vs Temperature

0.80

VIN = 7.5V

0.75 DRVCC = 5V

0.70

0.65

RISING EDGE

0.60

0.55

0.50

0.45

FALLING EDGE

0.40

0.35

0.30

–75 –50 –25 0 25 50 75 100 125

TEMPERATURE (°C)

4441 G05

4

EN Pin Input Threshold Voltage

vs Temperature

1.30

1.28

1.26

VIN = 7.5V

DRVCC = 5V

1.24

1.22

RISING EDGE

1.20

1.18

1.16

1.14

1.12

1.10

FALLING EDGE

1.08

1.06

1.04

–75 –50 –25 0 25 50 75 100 125

TEMPERATURE (°C)

4441 G03

DRVCC Voltage vs Temperature

5.50

R1 = 330k

5.45 R2 = 100k

5.40

5.35

5.30

5.25

VIN = 25V

5.20

VIN = 7.5V

5.15

5.10

5.05

5.00

–75 –50 –25 0 25 50 75 100 125

TEMPERATURE (°C)

4441 G06

44411fa

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