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LT1939IDD-TRPBF Datasheet(PDF) 5 Page - Linear Technology |
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LT1939IDD-TRPBF Datasheet(HTML) 5 Page - Linear Technology |
5 / 24 page LT1939 5 1939f TYPICAL PERFORMANCE CHARACTERISTICS Power Good Thresholds vs Temperature Power Good Sink Currents vs Temperature Frequency vs Temperature Peak Switch Current vs Temperature LDRV Short-Circuit Current vs Temperature External Sync Duty Cycle Range vs External Sync Frequency Minimum Switching Times Frequency vs RRT/SYNC Switch Saturation Voltage vs Switch Current TEMPERATURE (°C) –50 0.65 0.66 0.68 0.69 0.70 0.75 0.72 0 50 75 1939 G10 0.67 0.73 0.74 0.71 –25 25 100 150 125 RISING EDGE FALLING EDGE TEMPERATURE (°C) –50 0 100 300 400 500 1000 700 0 50 75 1939 G11 200 800 900 600 PG PG –25 25 100 150 125 TEMPERATURE (°C) –50 400 420 460 480 500 600 540 0 50 75 1939 G12 440 560 580 520 –25 25 100 150 125 RRT/SYNC = 90.9k TEMPERATURE (°C) –50 2.5 2.6 2.8 2.9 3.0 3.5 3.2 0 50 75 1939 G13 2.7 3.3 3.4 3.1 –25 25 100 150 125 TEMPERATURE (°C) –50 10 11 13 14 15 20 17 0 50 75 1939 G14 12 18 19 16 –25 25 100 150 125 SYNCHRONIZATION FREQUENCY (kHz) 250 0 10 30 40 50 100 70 750 1250 19939 G15 20 80 90 60 1750 2250 MINIMUM DUTY CYCLE MAXIMUM DUTY CYCLE TEMPERATURE (°C) –50 50 75 125 150 175 300 225 0 50 75 1939 G16 100 250 275 200 –25 25 100 125 150 MINIMUM ON TIME MINIMUM OFF TIME RRT/SYNC (kΩ) 0 1500 2000 2500 160 1939 G17 1000 500 1250 1750 2250 750 250 0 40 20 80 60 120 140 180 100 200 SWITCH CURRENT (A) 0 200 400 600 100 300 500 0.4 0.8 1.2 1.6 1939 G18 2.0 0.2 0 0.6 1.0 1.4 1.8 –50°C 150°C 25°C |
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