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LTC3868IGN-1PBF Datasheet(PDF) 6 Page - Linear Technology |
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LTC3868IGN-1PBF Datasheet(HTML) 6 Page - Linear Technology |
6 / 38 page LTC3868-1 38681fb 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– Pins Input Bias Current Maximum Current Sense Threshold vs Duty Cycle Foldback Current Limit Quiescent Current vs Temperature Shutdown Current vs Temperature INPUT VOLTAGE (V) 5 350 20 38681 G10 200 100 10 15 25 28 50 0 400 300 250 150 300µA LOAD FIGURE 12 CIRCUIT VOUT = 3.3V ONE CHANNEL ON NO LOAD TEMPERATURE (°C) –45 5.4 30 38681 G11 4.8 4.4 –20 5 55 4.2 4.0 5.6 5.2 5.0 4.6 80 105 130 INTVCC EXTVCC RISING EXTVCC FALLING INPUT VOLTAGE (V) 0 5.0 5.1 5.1 5.2 5.2 5 10 15 20 38681 G12 25 28 VSENSE COMMON MODE VOLTAGE (V) 0 –600 –500 –550 –450 –400 –300 –350 –200 –250 0 5 10 15 38681 G14 –50 –100 –150 FEEDBACK VOLTAGE (V) 0 0 10 30 40 50 0.6 90 38681 G16 20 0.3 0.1 0.7 0.4 0.2 0.8 0.5 0.9 60 70 80 ITH PIN VOLTAGE 0 40 60 80 0.6 1.0 38681 G13 20 0 0.2 0.4 0.8 1.2 1.4 –20 –40 PULSE-SKIPPING FORCED CONTINUOUS Burst Mode OPERATION (FALLING) Burst Mode OPERATION (RISING) 5% DUTY CYCLE DUTY CYCLE (%) 0 40 60 80 38681 G15 20 0 20 40 50 100 80 60 10 30 90 70 TEMPERATURE (°C) –45 110 120 190 200 240 220 –20 30 55 130 38681 G17 230 210 150 160 130 140 180 170 5 80 105 PLLIN/MODE = 0 VIN = 12V VOUT = 3.3V ONE CHANNEL ON TEMPERATURE (°C) –45 8 9 10 30 80 38681 G18 7 6 –20 5 55 105 130 5 4 |
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