Datasheet LT3590 (Analog Devices) - 3

LT3590
ELECTRICAL CHARACTERISTICS The
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denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C, VIN = 48V, VCTRL = 3.3V, unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Operating Voltage 4.5 V LED Current Sense Voltage (VIN - VLED) ● 190 200 210 mV Sense Voltage Load Regulation ΔILED = 10mA to 50mA 5 mV Quiescent Current ON, No Switching VLED = 47.7V 500 700 μA Quiescent Current in Shutdown VCTRL = 0V 15 20 μA Switching Frequency ● 650 850 1050 kHz Maximum Duty Cycle ● 90 % Switch Current Limit 80 115 150 mA Switch VCESAT ISW = 50mA 500 mV Switch Leakage Current VSW = 48V 1 2 μA VCTRL for Full LED Current ● 1.5 V VCTRL to Shut Down IC 100 mV VCTRL to Turn on IC 150 mV CTRL Pin Bias Current VCTRL = 1V, Current Out of Pin 100 nA LED Pin Bias Current VLED = 47.8V 9 14 μA LDO Voltage VREG IVREG = 1mA 3.1 3.3 3.5 V LDO Load Regulation ΔIVREG = 0mA to 1mA 17 mV LDO Current Limit 1.5 mA Schottky Forward Drop ISCHOTTKY = 50mA 0.8 V Schottky Leakage Current VR = 48V 4 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 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. 3590f 3