Datasheet LT3474, LT3474-1 (Analog Devices) - 5

LT3474/LT3474-1
TYPICAL PERFORMANCE CHARACTERISTICS Boost Pin Current Quiescent Current Reference Voltage
60 3.0 1.260 TA = 25°C TA = 25°C 50 2.5 1.255 40 2.0 1.250 (V) 30 1.5 REFV 1.245 20 1.0 INPUT CURRENT (mA) BOOST PIN CURRENT (mA) 1.240 10 0.5 0 0 1.235 0 250 500 750 1000 1250 1500 0 6 12 18 24 30 36 –50 –25 0 25 50 75 100 125 SWITCH CURRENT (mA) VIN (V) TEMPERATURE (°C) 3473 G12 3474 G13 3474 G14
Open-Circuit Output Voltage and Schottky Reverse Leakage Schottky Forward Voltage Drop Input Current
20 500 60 8 VR = 5V TA = 25°C TA = 25°C INPUT CURRENT 7 50 400 15 LT3474-1 6 40 5 300 LT3474 10 30 4 200 3 20 LT3474-1 OUTPUT VOLTAGE (V) LT3474 REVERSE CURRENT (μA) 5 INPUT CURRENT (mA) 2 FORWARD CURRENT (mA) 100 10 OUTPUT VOLTAGE 1 0 0 0 0 –50 –25 0 25 50 75 100 125 0 200 400 600 800 1000 0 10 20 30 40 TEMPERATURE (°C) FORWARD VOLTAGE (mV) VIN (V) 3474 G15 3474 G19 3474 G16
Minimum Input Voltage, Minimum Input Voltage, Two Series Connected White One White Luxeon III Star Luxeon III Stars
6 10 TA = 25°C TA = 25°C 5 TO START 9 TO RUN 4 LED VOLTAGE 8 TO START (V) 3 (V) IN IN V V 7 TO RUN 2 LED VOLTAGE 6 1 0 5 0 200 400 600 800 1000 0 200 400 600 800 1000 LED CURRENT (mA) LED CURRENT (mA) 3474 G17 3474 G18 3474fd 5