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LTC3826IG-1-TR Datasheet(PDF) 5 Page - Linear Technology |
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LTC3826IG-1-TR Datasheet(HTML) 5 Page - Linear Technology |
5 / 32 page LTC3826-1 5 38261fb Inductor Current at Light Load Soft Start-Up Tracking Start-Up 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 Total Input Bias Current Maximum Current Sense Threshold vs Duty Cycle 2μs/DIV FIGURE 13 CIRCUIT VOUT = 3.3V ILOAD = 100μA FORCED CONTINUOUS MODE 2A/DIV Burst Mode OPERATION PULSE SKIPPING MODE 38261 G07 20ms/DIV 38261 G08 VOUT2 2V/DIV VOUT1 2V/DIV 20ms/DIV 38261 G09 VOUT2 2V/DIV VOUT1 2V/DIV INPUT VOLTAGE (V) 5 350 300 250 200 150 100 50 0 20 30 38261 G10 10 15 25 35 NO LOAD 300μA LOAD TEMPERATURE (°C) –45 4.0 4.2 4.6 4.8 5.0 6.0 5.4 –5 35 55 38261 G11 4.4 5.6 5.8 5.2 –25 15 75 95 INTVCC EXTVCC RISING EXTVCC FALLING INPUT VOLTAGE (V) 0 5.0 5.5 5.2 10 20 25 38261 G12 5.3 5.4 5.1 515 30 35 40 ITH PIN VOLTAGE (V) 0 40 60 100 0.6 1.0 38261 G13 20 0 0.2 0.4 0.8 1.2 1.4 –20 –40 80 PULSE SKIPPING FORCED CONTINUOUS Burst Mode OPERATION (RISING) Burst Mode OPERATION (FALLING) 10% DUTY CYCLE VSENSE COMMON MODE VOLTAGE (V) 0 –120 –60 0 60 8 38261 G14 –180 –240 –150 –90 –30 30 –210 –270 –300 2 4 6 10 7 1 3 5 9 DUTY CYCLE (%) 0 40 80 120 20 60 100 20 40 60 80 38261 G15 100 10 030 50 70 90 FIGURE 13 CIRCUIT FIGURE 13 CIRCUIT FIGURE 13 CIRCUIT |
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