LTC4232 datasheet(4/18 Pages) AD

4 / 18 page

LT4200

Rev. 0

For more information www.analog.com

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 minimum of 10V

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

the device.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

AC Characteristics

tPHL(GATE)

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

Propagation Delay

VGATE < 21.8V Falling

µs

tPHL(ILIM)

Short-Circuit to GATE Low

VFB = 0, Step SENSE+ – SENSE– to 50mV,

VGATE < 15V Falling

µs

tD(ON)

Turn-On Delay

Step VUV to 2V, VGATE > 13V

tD(FAULT)

UV Low to Clear Fault Latch Delay

µs

tD(CB)

Circuit Breaker Filter Delay Time (Internal)

VFB = 0, Step SENSE+ – SENSE– to 50mV

0.25

0.45

0.7

tD(COOL_DOWN) Cool Down Delay (Internal)

TIMER = INTVCC

600

900

1200

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.

Note 4: This IC includes overtemperature protection that is intended

to protect the device during momentary overload conditions. Junction

temperature will exceed 150°C when overtemperature protection is active.

Continuous operation above the specified maximum operating junction

temperature may impair device reliability.

Note 5: SOA is tested with current limit folded back, VDD = 12V + 5%

or 12.6V and output shorted to GND. This condition is near the Spirito

region of the SOA curve. See the SOA Curve in the Typical Performance

Characteristic section.

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