Datasheet LT3595 (Analog Devices) - 5

LT3595
TYPICAL PERFORMANCE CHARACTERISTICS Switching Frequency Schottky Leakage Current Current Limit vs Temperature vs Temperature vs Temperature
150 2.4 1.4 2.3 140 1.2 μA) 2.2 1.0 130 2.1 VIN = 45V 0.8 120 2.0 0.6 1.9 110 VIN = 24V CURRENT LIMIT (mA) 0.4 1.8 100 SWITCHING FREQUENCY (MHz) VIN = 4.5V 1.7 0.2 SCHOTTKY LEAKAGE CURRENT ( 90 1.6 0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3595 G09 3595 G10 3595 G11
Switch Saturation Voltage (VCESAT) Schottky Forward Voltage Drop
700 100 600 80 500 T = –40°C 60 400 T = 125°C 300 T = 25°C 40 T = 125°C 200 T = 25°C 20 100 SWITCH SATURATION VOLTAGE (mV) SCHOTTKY FORWARD CURRENT (mA) T = – 40°C 0 0 0 20 40 60 80 100 0 0.2 0.4 0.6 0.8 1 SWITCH CURRENT (mA) SCHOTTKY FORWARD DROP (V) 3595 G13
Transient Response
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O
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N
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L
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D Waveforms
V I SHDN LED 5V/DIV CH 1 20mA/DIV VSW OPENLED 50V/DIV 5V/DIV VSW I CH 1 SW 50mA/DIV 50V/DIV ILED I CH 2 LED 20mA/DIV 20mA/DIV 3595 G14 3595 G15 100μs/DIV 20μs/DIV VIN = 45V V 10 LEDS AT 20mA IN = 45V 10 LEDS AT 20mA 3595f 5