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LTC3858EUFD-1TRPBF Datasheet(PDF) 6 Page - Linear Technology |
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LTC3858EUFD-1TRPBF Datasheet(HTML) 6 Page - Linear Technology |
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6 / 38 page  LTC3858-1 38581fb 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 Shutdown Current vs Temperature INPUT VOLTAGE (V) 5 350 20 3858 G10 200 100 10 15 25 50 0 400 300 250 150 30 35 40 300µA LOAD FIGURE 12 CIRCUIT VOUT = 3.3V ONE CHANNEL ON NO LOAD TEMPERATURE (°C) –45 5.4 30 3858 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 3858 G12 25 30 35 40 VSENSE COMMON MODE VOLTAGE (V) 0 –600 –500 –550 –450 –400 –300 –350 –200 –250 0 5 10 15 20 3858 G14 25 –50 –100 –150 FEEDBACK VOLTAGE (V) 0 0 10 30 40 50 0.6 90 3858 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 3858 G13 20 0 0.2 0.4 0.8 1.2 1.4 –20 –40 PULSE-SKIPPING MODE FORCED CONTINUOUS MODE Burst Mode OPERATION (FALLING) Burst Mode OPERATION (RISING) 5% DUTY CYCLE DUTY CYCLE (%) 0 40 60 80 3858 G15 20 0 20 40 50 100 80 60 10 30 90 70 TEMPERATURE (°C) –45 110 190 –20 30 55 130 3858 G17 230 210 150 130 170 5 80 105 PLLIN/MODE = 0 VIN = 12V VOUT = 3.3V ONE CHANNEL ON TEMPERATURE (°C) –45 8 9 10 30 80 3858 G18 7 6 –20 5 55 105 130 5 4 |
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