LTC4449

3

4449f

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: The LTC4449I is guaranteed to meet specifications over the full

–40°C to 125°C operating junction temperature range. The LTC4449E is

guaranteed to meet specifications from 0°C to 85°C with specifications

over the –40°C to 85°C operating junction temperature range assured by

design, characterization and correlation with statistical process controls.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Input Signal (IN)

TG Turn-On Input Threshold

l

l

3

1.9

3.5

2.2

4

2.6

V

V

TG Turn-Off Input Threshold

l

l

2.75

1.8

3.25

2.09

3.75

2.5

V

V

BG Turn-On Input Threshold

l

l

0.8

0.8

1.25

1.1

1.6

1.4

V

V

BG Turn-Off Input Theshold

l

l

1.05

0.9

1.5

1.21

1.85

1.5

V

V

Maximum Current Into or Out of IN in

Shutdown Mode

150

75

300

150

μA

μA

High Side Gate Driver Output (TG)

TG High Output Voltage

140

mV

TG Low Output Voltage

80

mV

TG Peak Pull-Up Current

l

2

3.2

A

TG Peak Pull-Down Current

l

1.5

2.4

A

Low Side Gate Driver Output (BG)

BG High Output Voltage

100

mV

BG Low Output Voltage

100

mV

BG Peak Pull-Up Current

l

2

3.2

A

BG Peak Pull-Down Current

l

3

4.5

A

Switching Time

BG Low to TG High Propagation Delay

14

ns

IN Low to TG Low Propagation Delay

13

ns

TG Low to BG High Propagation Delay

13

ns

IN High to BG Low Propagation Delay

11

ns

TG Output Risetime

8

ns

TG Output Falltime

7

ns

BG Output Risetime

7

ns

BG Output Falltime

4

ns

Note 3: This IC includes overtemperature protection that is intended

to protect the device during momentary overload conditions. Junction

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

Continuous operation above the specified maximum operating junction

temperature may impair device reliability.