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