LT3758 datasheet(4/36 Pages) LINER

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LT3758

3758f

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

erature range, otherwise speciﬁcations are at TA = 25°C. VIN = 24V, SHDN/UVLO = 24V, SENSE = 0V, unless otherwise noted.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

INTVCC Current in Shutdown

SHDN/UVLO = 0V, INTVCC = 8V

μA

INTVCC Voltage to Bypass Internal LDO

7.5

Logic Inputs

SHDN/UVLO Threshold Voltage Falling

VIN = INTVCC = 8V

1.17

1.22

1.27

SHDN/UVLO Input Low Voltage

IVIN Drops Below 1μA

0.4

SHDN/UVLO Pin Bias Current Low

SHDN/UVLO = 1.15V

1.7

2.5

μA

SHDN/UVLO Pin Bias Current High

SHDN/UVLO = 1.33V

100

Gate Driver

tr Gate Driver Output Rise Time

CL = 3300pF (Note 5), INTVCC = 7.5V

tf Gate Driver Output Fall Time

CL = 3300pF (Note 5), INTVCC = 7.5V

Gate Output Low (VOL)

0.05

Gate Output High (VOH)

INTVCC

–0.05

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 LT3758E is guaranteed to meet performance speciﬁcations

from the 0°C to 125°C junction temperature. Speciﬁcations over the –40°C

to 125°C operating junction temperature range are assured by design,

characterization and correlation with statistical process controls. The

LT3758I is guaranteed over the full –40°C to 125°C operating junction

temperature range.

Note 3: The LT3758 is tested in a feedback loop which servos VFBX to the

reference voltages (1.6V and –0.8V) with the VC pin forced to 1.3V.

Note 4: FBX overvoltage lockout is measured at VFBX(OVERVOLTAGE) relative

to regulated VFBX(REG).

Note 5: Rise and fall times are measured at 10% and 90% levels.

Note 6: SHDN/UVLO = 1.33V when VIN = 5.5V.

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