LTC4232 datasheet(4/20 Pages) LINER

4 / 20 page

LTC4234

4234fa

For more information www.linear.com/LTC4234

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.

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

dissipation, PD, according to the formula:

TJ = TA + (PD • 15°C/W)

Note 6: SOA tested at room temperature. SOA (i.e. P2t), is reduced at

elevated temperatures according to the following formula:

P2t TJ

( )=200 W2s







 •

150

°C– TJ

150

°C–25°C









Note 7: Guaranteed by design and extrapolated from P2t limit of 200W2s.

ELECTRICAL CHARACTERISTICS 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

AC Characteristics

tPHL(GATE)

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

Low Propagation Delay

VGATE < 17.8V Falling

µs

tPHL(ILIM)

Short Circuit to GATE Low

VFB = 0, Step VDD − 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 VDD − SENSE− to 50mV

1.2

2.7

tD(COOL_DOWN) Cool Down Delay (Internal)

600

900

1200

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