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LT3799EMSE-1-PBF 查看數據表(PDF) - Linear Technology

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LT3799EMSE-1-PBF Datasheet PDF : 20 Pages
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LT3799-1
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 18V, unless otherwise noted.
PARAMETER
FB Pin Bias Current
CTRL1/CTRL2/CTRL3 Pin Bias Current
Max SENSE Current Limit Threshold
SENSE Input Bias Current
Current Loop Voltage Gain
CT Pin Charge Current
CT Pin Discharge Current
CT Pin Low Threshold
CT Pin High Threshold
CT Pin Low Hysteresis
FB Pin High Threshold
DCM Current Turn-On Threshold
Maximum Oscillator Frequency
Minimum Oscillator Frequency
Back-Up Oscillator Frequency
Linear Regulator
INTVCC Regulation Voltage
Dropout (VIN – INTVCC)
Current Limit
Current Limit
Gate Driver
tr GATE Driver Output Rise Time
tf GATE Driver Output Fall Time
GATE Output Low (VOL)
GATE Output High (VOH)
CONDITIONS
(Note 3), FB = 1V
CTRL1/CTRL2/CTRL3 = 1V
Current Out of Pin, SENSE = 0V
ΔVCTRL/ΔVSENSE, 1000pF Cap from COMP+ to COMP
Falling Threshold
Rising Threshold
Current Out of Pin
COMP+ = 1.2V, VIN_SENSE = 1V
COMP+ = 0V, VIN_SENSE
INTVCC = –10mA, Below VIN Turn-Off Voltage
Below Undervoltage Threshold
Above Undervoltage Threshold
CL = 3300pF, 10% to 90%
CL = 3300pF, 90% to 10%
MIN TYP MAX UNITS
100
600
nA
±25
nA
96
100
106
mV
15
μA
21
V/V
10
μA
200
nA
240
mV
1.25
V
100
mV
1.22 1.25 1.29
V
45
μA
300
kHz
25
kHz
20
kHz
9.8
10
10.4
V
750 1150
mV
15
25
mA
80
120
mA
20
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 LT3799-1E is guaranteed to meet performance specifications
from 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
LT3799-1I is guaranteed to meet performance specifications from –40°C
to 125°C operating junction temperature.
Note 3: Current flows out of the FB pin.
37991f
3

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