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