LTC4449 datasheet(3/12 Pages) LINER

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LTC4449

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.

ELECTRICAL CHARACTERISTICS The l denotes the speciﬁcations which apply over the full operating junction

temperature range, otherwise speciﬁcations are at TA = 25°C. VCC = VLOGIC = VBOOST = 5V, VTS = GND = 0V, unless otherwise noted.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Input Signal (IN)

VIH(TG)

TG Turn-On Input Threshold

VLOGIC ≥ 5V, IN Rising

VLOGIC = 3.3V, IN Rising

1.9

3.5

2.2

2.6

VIL(TG)

TG Turn-Off Input Threshold

VLOGIC ≥ 5V, IN Falling

VLOGIC = 3.3V, IN Falling

2.75

1.8

3.25

2.09

3.75

2.5

VIH(BG)

BG Turn-On Input Threshold

VLOGIC ≥ 5V, IN Falling

VLOGIC = 3.3V, IN Falling

0.8

1.25

1.1

1.6

1.4

VIL(BG)

BG Turn-Off Input Theshold

VLOGIC ≥ 5V, IN Rising

VLOGIC = 3.3V, IN Rising

1.05

0.9

1.5

1.21

1.85

1.5

IIN(SD)

Maximum Current Into or Out of IN in

Shutdown Mode

VLOGIC ≥ 5V, IN Floating

VLOGIC = 3.3V, IN Floating

150

300

150

μA

High Side Gate Driver Output (TG)

VOH(TG)

TG High Output Voltage

ITG = –100mA, VOH(TG) = VBOOST – VTG

140

VOL(TG)

TG Low Output Voltage

ITG = 100mA, VOL(TG) = VTG – VTS

IPU(TG)

TG Peak Pull-Up Current

3.2

IPD(TG)

TG Peak Pull-Down Current

1.5

2.4

Low Side Gate Driver Output (BG)

VOH(BG)

BG High Output Voltage

IBG = –100mA, VOH(BG) = VCC – VBG

100

VOL(BG)

BG Low Output Voltage

IBG = 100mA

100

IPU(BG)

BG Peak Pull-Up Current

3.2

IPD(BG)

BG Peak Pull-Down Current

4.5

Switching Time

tPLH(TG)

BG Low to TG High Propagation Delay

tPHL(TG)

IN Low to TG Low Propagation Delay

tPLH(BG)

TG Low to BG High Propagation Delay

tPHL(BG)

IN High to BG Low Propagation Delay

tr(TG)

TG Output Risetime

10% to 90%, CL = 3nF

tf(TG)

TG Output Falltime

10% to 90%, CL = 3nF

tr(BG)

BG Output Risetime

10% to 90%, CL = 3nF

tf(BG)

BG Output Falltime

10% to 90%, CL = 3nF

The junction temperature TJ is calculated from the ambient temperature TA

and power dissipation PD according to the following formula:

TJ = TA + (PD • 64°C/W)

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.

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