LTC4218CDHC datasheet(4/16 Pages) LINER

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LTC4218

4218fb

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.

The ● 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

ITIMER(RATIO)

TIMER Pin Current Ratio ITIMER(DN)/

ITIMER(UP)

●

1.6

2.7

IMON(FS)

IMON Fullscale Output Current

VSENSE+ – VSENSE– = 15mV

●

100

106

μA

IMON(OFF)

IMON Pin Offset Current

VSENSE+ – VSENSE– = 1mV

●

±0

±6

μA

GIMON

IMON Pin Gain

VSENSE+ – VSENSE– = 15mV and 1mV

●

6.47

6.67

6.87

μA/mV

AC Characteristics

tPHL(GATE)

Input High (OV), Input Low (UV) to GATE

Low Propagation Delay

VGATE < 16.5V Falling

●

μs

tPHL(SENSE)

VSENSE+ – VSENSE– High to GATE Low

Propagation Delay

VFB = 0, Step (VSENSE+ – VSENSE–) to

60mV, CGATE = 1.5nF, VGATE < 16.5V

Falling

●

0.2

μs

tD(ON)

Turn-On Delay

Step VUV to 2V, VGATE > 13V

●

100

150

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

the SOURCE pin. Driving either GATE or SOURCE pin to voltages beyond

the clamp may damage the device.

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