LT3758 Просмотр технического описания (PDF) - Linear Technology
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LT3758 Datasheet PDF : 36 Pages
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LT3758/LT3758A
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
INTVCC Current in Shutdown
INTVCC Voltage to Bypass Internal LDO
Logic Inputs
CONDITIONS
SHDN/UVLO = 0V, INTVCC = 8V
MIN TYP MAX UNITS
16
µA
7.5
V
SHDN/UVLO Threshold Voltage Falling
SHDN/UVLO Input Low Voltage
SHDN/UVLO Pin Bias Current Low
VIN = INTVCC = 8V
IVIN Drops Below 1µA
SHDN/UVLO = 1.15V
l 1.17 1.22 1.27
V
0.4
V
1.7
2
2.5
µA
SHDN/UVLO Pin Bias Current High
SHDN/UVLO = 1.33V
10
100
nA
Gate Driver
tr Gate Driver Output Rise Time
tf Gate Driver Output Fall Time
Gate Output Low (VOL)
Gate Output High (VOH)
CL = 3300pF (Note 5), INTVCC = 7.5V
CL = 3300pF (Note 5), INTVCC = 7.5V
22
ns
20
ns
0.05
V
INTVCC
V
–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/LT3758AE are 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/LT3758AI are guaranteed over the full –40°C to
125°C operating junction temperature range. The LT3758H/LT3758AH are
guaranteed over the full –40°C to 150°C operating junction temperature
range. High junction temperatures degrade operating lifetimes. Operating
lifetime is derated at junction temperatures greater than 125°C. The
LT3758MP/LT3758AMP are 100% tested and guaranteed over the full
–55°C to 150°C operating junction temperature range.
Note 3: The LT3758/LT3758A are 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.
Note 7: For VIN below 6V, the SHDN/UVLO pin must not exceed VIN.
Note 8: The LT3758/LT3758A include overtemperature protection that
is intended to protect the device during momentary overload conditions.
Junction temperature will exceed the maximum operating junction
temperature when overtemperature protection is active. Continuous
operation above the specified maximum operating junction temperature
may impair device reliability.
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