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LT3590
ELECTRICAL CHARACTERISTICS The ● denotes the speci?cations which apply over the full operating
temperature range, otherwise speci?cations are at T A = 25°C, V IN = 48V, V CTRL = 3.3V, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Minimum Operating Voltage
4.5
V
LED Current Sense Voltage (V IN - V LED )
Sense Voltage Load Regulation
Quiescent Current ON, No Switching
Quiescent Current in Shutdown
Switching Frequency
Maximum Duty Cycle
Switch Current Limit
Switch V CESAT
Switch Leakage Current
V CTRL for Full LED Current
ΔI LED = 10mA to 50mA
V LED = 47.7V
V CTRL = 0V
I SW = 50mA
V SW = 48V
●
●
●
●
190
650
90
80
1.5
200
5
500
15
850
115
500
1
210
700
20
1050
150
2
mV
mV
μA
μA
kHz
%
mA
mV
μA
V
V CTRL to Shut Down IC
V CTRL to Turn on IC
150
100
mV
mV
CTRL Pin Bias Current
V CTRL = 1V, Current Out of Pin
100
nA
LED Pin Bias Current
V LED = 47.8V
9
14
μA
LDO Voltage V REG
LDO Load Regulation
I VREG = 1mA
ΔI VREG = 0mA to 1mA
3.1
3.3
17
3.5
V
mV
LDO Current Limit
1.5
mA
Schottky Forward Drop
Schottky Leakage Current
I SCHOTTKY = 50mA
V R = 48V
0.8
4
V
μA
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 LT3590E is guaranteed to meet performance speci?cations
from 0°C to 85°C junction temperature. Speci?cations over the –40°C
to 85°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls.
3590f
3
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