Datasheet LT3500 (Analog Devices) - 6

LT3500
TYPICAL PERFORMANCE CHARACTERISTICS Peak Switch Current LDRV Short-Circuit Current External Sync Duty Cycle Range vs Temperature vs Temperature vs External Sync Frequency
3.5 20 100 3.4 19 90 MAXIMUM DUTY CYCLE 3.3 18 80 MSE PACKAGE 3.2 17 70 3.1 16 60 TA = 25°C 3.0 15 50 DD PACKAGE 2.9 14 40 CURRENT (A) CURRENT (mA) DUTY CYCLE (%) 2.8 13 30 2.7 12 20 MINIMUM DUTY CYCLE 2.6 11 10 2.5 10 0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 250 750 1250 1750 2250 TEMPERATURE (°C) TEMPERATURE (°C) SYNCHRONIZATION FREQUENCY (kHz) 3500 G13 3500 G14 3500 G15
Switch Saturation Voltage Minimum Switching Times Frequency vs RRT/SYNC vs Switch Current
300 2500 600 TA = 25°C 275 2250 500 250 2000 225 1750 400 200 1500 175 1250 300 TIME (ns) 150 MINIMUM ON TIME 1000 –50°C 200 125 FREQUENCY (kHz) 750 100 MINIMUM OFF TIME 500 25°C 100 75 250 SWITCH SATURATION VOLTAGE (mV) 150°C 50 0 0 –50 –25 0 25 50 75 100 125 150 0 20 40 60 80 100 120 140 160 180 200 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 TEMPERATURE (°C) R SWITCH CURRENT (A) RT/SYNC (kΩ) 3500 G16 3500 G17 3500 G18
Minimum Boost Voltages Boost Current vs Switch Current vs Temperature Minimum Input Voltage
50 2.7 8 TA = 25°C 45 7 2.5 40 150°C 6 V 35 OUT1 = 5V –50°C 2.3 5 30 VOUT1 = 3.3V 25 2.1 4 MINIMUM BOOST FOR 20 SWITCH SATURATION 3 25°C 1.9 INPUT VOLTAGE (V) BOOST CURRENT (mA) 15 BOOST VOLTAGE (V) 2 10 1.7 1 5 fSW = 1MHz L = 3.3μH 0 1.5 0 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 –50 –25 0 25 50 75 100 125 150 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 SWITCH CURRENT (A) TEMPERATURE (°C) LOAD CURRENT (A) 3500 G19 3500 G20 3500 G21 3500fc 6