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LTC3890EUH Datasheet(PDF) 6 Page - Linear Technology |
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LTC3890EUH Datasheet(HTML) 6 Page - Linear Technology |
6 / 36 page LTC3890 6 3890f TYPICAL PERFORMANCE CHARACTERISTICS Total Input Supply Current vs Input Voltage EXTVCC Switchover and INTVCC Voltages vs Temperature INTVCC Line Regulation Maximum Current Sense Voltage vs ITH Voltage SENSE– Pin Input Bias Current Maximum Current Sense Threshold vs Duty Cycle Foldback Current Limit Quiescent Current vs Temperature INTVCC vs Load Current TEMPERATURE (°C) –45 4.0 4.2 4.6 4.8 5.0 6.0 5.4 5 55 80 3890 G11 4.4 5.6 5.8 5.2 –20 30 105 130 INTVCC EXTVCC RISING EXTVCC FALLING VITH (V) 0 40 60 80 0.6 1.0 3890 G13 20 0 0.2 0.4 0.8 1.2 1.4 –20 –40 Burst Mode OPERATION PULSE SKIPPING MODE FORCED CONTINUOUS MODE ILIM = FLOAT ILIM = INTVCC ILIM = GND DUTY CYCLE (%) 0 50 40 60 70 80 3890 G15 30 20 20 40 50 100 80 60 10 30 90 70 ILIM = FLOAT ILIM = INTVCC ILIM = GND TEMPERATURE (°C) –45 75 30 3890 G17 60 50 –20 5 55 45 40 80 70 65 55 80 105 130 LOAD CURRENT (mA) 0 5.10 5.15 5.20 160 3890 G18 5.05 5.00 4.95 20 40 60 80 100 120 140 180 200 EXTVCC = 0V EXTVCC = 8.5V VIN = 12V INPUT VOLTAGE (V) 0 200 300 20 30 35 40 45 50 55 60 65 15 10 525 3890 G10 150 100 50 250 NO LOAD 300μA INPUT VOLTAGE (V) 4.8 5.0 5.2 20 30 35 40 45 50 55 60 65 15 10 525 3890 G12 4.9 5.1 VSENSE COMMON MODE VOLTAGE (V) 0 –800 –500 –600 –700 –400 –300 –200 0 5 10 15 20 3890 G14 25 –100 FEEDBACK VOLTAGE (MV) 0 40 60 800 3890 G16 20 0 200 400 500 80 30 50 10 70 600 100 300 700 ILIM = FLOAT ILIM = INTVCC ILIM = GND |
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