LTC4219 datasheet(4/16 Pages) LINER

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LTC4219

4219f

IDD vs VDD

INTVCC Load Regulation

EN1, EN2 Low Threshold

vs Temperature

ELECTRICAL CHARACTERISTICS

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: All currents into pins are positive, all voltages are referenced to

GND unless otherwise speciﬁed.

Note 3: An internal clamp limits the GATE pin to a maximum of 6.5V

above OUT. Driving this pin to voltages beyond the clamp may damage the

device.

The

l denotes the speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are at TA = 25°C. VDD = 12V unless otherwise noted.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

AC Characteristics

tPHL(GATE)

Input High (EN1, EN2) to Gate Low

Propagation Delay

VGATE < 16.5V Falling

810

μs

tPHL(ILIM)

Short Circuit to Gate Low

VFB = 0, Step ISENSE to 3A,

VGATE < 16.5V Falling

μs

tD(ON)

Turn-On Delay

Step VEN1 and VEN2 to 0V, VGATE > 13V

100

150

tD(CB)

Circuit Breaker Filter Delay Time (Internal)

VFB = 0V, Step ISENSE to 3A

1.5

2.7

Note 4: 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.

Note 5: TJ is calculated from the ambient temperature, TA, and power

dissipation, PD, according to the formula:

TJ = TA + (PD • 43°C/W)

VDD (V)

1.0

1.2

1.4

1.6

1.8

2.0

101520

4219 G01

–40°C

25°C

85°C

ILOAD (mA)

0.5

1.5

1.0

3.5

2.0

2.5

3.0

4219 G02

–14

–12

–10

–8

–6

–4

–2

VDD = 5V

VDD = 3.3V

TEMPERATURE (°C)

–50

1.234

1.232

1.230

1.228

1.226

–25

4219 G03

100

TYPICAL PERFORMANCE CHARACTERISTICS T

A = 25°C, VDD = 12V unless otherwise noted.

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