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LTC3835EGN-1 Datasheet(PDF) 5 Page - Linear Technology |
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LTC3835EGN-1 Datasheet(HTML) 5 Page - Linear Technology |
5 / 28 page LTC3835-1 5 38351fc TYPICAL PERFORMANCE CHARACTERISTICS Inductor Current at Light Load Soft Start-Up Tracking Start-Up 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 Total Input Bias Current Maximum Current Sense Threshold vs Duty Cycle TA = 25°C, unless otherwise noted. 4μs/DIV PULSE- SKIPPING MODE 38351 G07 2A/DIV Burst Mode OPERATION FORCED CONTIN- UOUS MODE 20ms/DIV 38351 G08 VOUT 1V/DIV 20ms/DIV 38351 G09 VOUT2 2V/DIV VOUT1 2V/DIV (SLAVE) (MASTER) FIGURE 10 CIRCUIT VOUT = 3.3V ILOAD = 300μA FIGURE 10 CIRCUIT FIGURE 10 CIRCUIT INPUT VOLTAGE (V) 5 350 300 250 200 150 100 50 0 20 30 38351 G10 10 15 25 35 300μA LOAD NO LOAD TEMPERATURE (°C) –45 4.0 4.2 4.6 4.8 5.0 6.0 5.4 –5 35 55 38351 G11 4.4 5.6 5.8 5.2 –25 15 75 95 EXTVCC FALLING EXTVCC RISING INTVCC INPUT VOLTAGE (V) 0 5.00 5.05 5.15 5.20 5.25 5.50 5.35 10 20 25 38351 G12 5.10 5.40 5.45 5.30 515 30 35 40 ITH PIN VOLTAGE (V) 0 40 60 100 0.6 1.0 38351 G13 20 0 0.2 0.4 0.8 1.2 1.4 –20 –40 80 PULSE SKIPPING FORCED CONTINUOUS BURST MODE (RISING) BURST MODE (FALLING) 10% DUTY CYCLE VSENSE COMMON MODE VOLTAGE (V) 0 –700 –600 –400 –300 –200 6789 200 38351 G14 –500 12345 10 –100 0 100 DUTY CYCLE (%) 0 40 80 120 20 60 100 20 40 60 80 38351 G15 100 10 030 50 70 90 |
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