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LT3970IDDB-3.3-TRPBF Datasheet(PDF) 5 Page - Linear Technology |
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LT3970IDDB-3.3-TRPBF Datasheet(HTML) 5 Page - Linear Technology |
5 / 22 page LT3970/LT3970-3.3/LT3970-5 5 3970fa No-Load Supply Current Maximum Load Current Maximum Load Current Maximum Load Current Load Regulation TYPICAL PERFORMANCE CHARACTERISTICS Minimum Switch On-Time/Switch Off-Time Switch Current Limit Switch Current Limit Switching Frequency TA = 25°C, unless otherwise noted. TEMPERATURE (°C) –50 9 12 15 25 75 150 3970 G05 6 3 0 –25 0 50 100 125 FRONT PAGE APPLICATION VIN = 12V VOUT = 3.3V R1 = 1M R2 = 576k INPUT VOLTAGE (V) 5 350 400 450 500 550 10 15 20 25 3870 G06 30 35 40 FRONT PAGE APPLICATION VOUT = 3.3V TYPICAL MINIMUM INPUT VOLTAGE (V) 5 350 400 450 500 600 550 10 15 20 25 3870 G07 30 35 40 FRONT PAGE APPLICATION VOUT = 5V TYPICAL MINIMUM TEMPERATURE (°C) –50 300 400 500 600 25 75 3970 G08 200 100 0 –25 0 50 100 150 125 LIMITED BY MAXIMUM JUNCTION TEMPERATURE; θJA = 76°C/W FRONT PAGE APPLICATION VIN = 12V VOUT = 5V LIMITED BY CURRENT LIMIT H GRADE LOAD CURRENT (mA) 0 0.15 150 3970 G09 0 –0.10 50 100 200 –0.15 –0.20 0.20 0.10 0.05 –0.05 250 300 350 FRONT PAGE APPLICATION REFERENCED FROM VOUT AT 100mA LOAD DUTY CYCLE (%) 0 200 300 400 500 600 700 800 20 40 60 80 3970 G10 100 SWITCH PEAK CURRENT LIMIT CATCH DIODE VALLEY CURRENT LIMIT TEMPERATURE ( C) –50 200 300 400 500 600 050 100 150 3970 G11 700 800 –25 25 75 125 SWITCH PEAK CURRENT LIMIT CATCH DIODE VALLEY CURRENT LIMIT TEMPERATURE (°C) –50 0 0.4 0.8 1.2 1.6 2.4 –25 0 255075 3970 G12 100 125 150 2.0 0.2 0.6 1.0 1.4 2.2 1.8 TEMPERATURE (°C) –50 0 20 60 80 100 200 140 0 50 75 3970 G13 40 160 180 120 –25 25 100 125 150 MINIMUM OFF-TIME LOAD CURRENT = 175mA MINIMUM ON-TIME |
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