Datasheet LT3590 (Analog Devices) - 4

LT3590
TYPICAL PERFORMANCE CHARACTERISTICS Switch Saturation Voltage Shutdown Quiescent (VCESAT) Schottky Forward Voltage Drop Current vs VIN
0.8 1.2 20 VCTRL = 0V 1.1 TA = 25°C 0.7 18 –40°C 1.0 –40°C 25°C 0.6 0.9 16 0.5 125°C 0.8 125°C 25°C 0.7 14 0.4 0.6 SHUTDOWN CURRENT (μA) SCHOTTKY FORWARD DROP (V) 12 SWITCH SATURATION VOLTAGE (V) 0.3 0.5 0.2 0.4 10 20 40 60 80 100 0 50 100 150 200 0 10 20 30 40 50 60 SWITCH CURRENT (mA) SCHOTTKY FORWARD CURRENT (mA) VIN (V) 3590 G01 3590 G02 3590 G03
Shutdown Quiescent Current vs Temperature Quiescent Current Schottky Leakage Current
20 600 2.0 VCTRL = 0V V V CTRL = 3.3V IN = 48V TA = 25°C 18 550 1.5 V 16 IN = 48V 500 1.0 14 VIN = 24V 450 SHUTDOWN CURRENT (μA) QUIESCENT CURRENT (μA) 0.5 12 SCHOTTKY LEAKAGE CURRENT (μA) VIN = 4.5V 10 400 0 –50 –25 0 25 50 75 100 125 0 10 20 30 40 50 60 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) VIN (V) TEMPERATURE (°C) 3590 G04 3590 G05 3590 G06
Switching Waveform Transient Response
CTRL 5V/DIV IL 20mA/DIV VSW 50V/DIV V IL SW 20V/DIV 50mA/DIV ILED 50mA/DIV 3590 G07 3590 G08 1μs/DIV 40μs/DIV V V IN = 48V IN = 48V I I LED = 50mA LED = 50mA 10 WHITE LEDs 10 BLUE LEDs L = 470μH (COILCRAFT) 3590f 4