Datasheet LTC3826-1 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | 30µA IQ, Dual, 2-Phase Synchronous Step-Down Controller |
| Pages / Page | 32 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS. Inductor Current at Light Load. Soft … |
| File Format / Size | PDF / 438 Kb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. Inductor Current at Light Load. Soft Start-Up. Tracking Start-Up
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LTC3826-1
TYPICAL PERFORMANCE CHARACTERISTICS Inductor Current at Light Load Soft Start-Up Tracking Start-Up
FORCED VOUT2 VOUT2 CONTINUOUS 2V/DIV 2V/DIV MODE 2A/DIV Burst Mode V V OPERATION OUT1 OUT1 2V/DIV 2V/DIV PULSE SKIPPING MODE 2μs/DIV 38261 G07 FIGURE 13 CIRCUIT VOUT = 3.3V ILOAD = 100μA 20ms/DIV 20ms/DIV 38261 G08 38261 G09 FIGURE 13 CIRCUIT FIGURE 13 CIRCUIT
Total Input Supply Current EXTVCC Switchover and INTVCC vs Input Voltage Voltages vs Temperature INTVCC Line Regulation
350 6.0 5.5 5.8 300 5.6 5.4 250 5.4 INTVCC 5.2 5.3 200 VOLTAGE (V) CC 5.0 150 EXTV VOLTAGE (V) Y CURRENT (μA) CC RISING 300μA LOAD 4.8 CC 5.2 AND INTV 100 4.6 SUPPL INTV CC EXTVCC FALLING 4.4 5.1 50 NO LOAD EXTV 4.2 0 4.0 5.0 5 10 15 20 25 30 35 –45 –25 –5 15 35 55 75 95 0 5 10 15 20 25 30 35 40 INPUT VOLTAGE (V) TEMPERATURE (°C) INPUT VOLTAGE (V) 38261 G10 38261 G11 38261 G12 FIGURE 13 CIRCUIT
Maximum Current Sense Voltage Sense Pins Total Input Maximum Current Sense vs ITH Voltage Bias Current Threshold vs Duty Cycle
100 60 120 PULSE SKIPPING FORCED CONTINUOUS 30 80 Burst Mode OPERATION 0 100 (RISING) –30 60 Burst Mode OPERATION (FALLING) –60 80 40 –90 –120 60 20 –150 –180 40 0 INPUT BIAS CURRENT (μA) –210 –20 –240 20 CURRENT SENSE THRESHOLD (mV) –270 10% DUTY CYCLE MAXIMUM CURRENT SENSE VOLTAGE (mV) –40 –300 0 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 0 1 2 3 4 5 6 7 8 9 10 0 10 20 30 40 50 60 70 80 90 100 ITH PIN VOLTAGE (V) VSENSE COMMON MODE VOLTAGE (V) DUTY CYCLE (%) 38261 G13 38261 G14 38261 G15 38261fb 5
TYPICAL PERFORMANCE CHARACTERISTICS Inductor Current at Light Load Soft Start-Up Tracking Start-Up
FORCED VOUT2 VOUT2 CONTINUOUS 2V/DIV 2V/DIV MODE 2A/DIV Burst Mode V V OPERATION OUT1 OUT1 2V/DIV 2V/DIV PULSE SKIPPING MODE 2μs/DIV 38261 G07 FIGURE 13 CIRCUIT VOUT = 3.3V ILOAD = 100μA 20ms/DIV 20ms/DIV 38261 G08 38261 G09 FIGURE 13 CIRCUIT FIGURE 13 CIRCUIT
Total Input Supply Current EXTVCC Switchover and INTVCC vs Input Voltage Voltages vs Temperature INTVCC Line Regulation
350 6.0 5.5 5.8 300 5.6 5.4 250 5.4 INTVCC 5.2 5.3 200 VOLTAGE (V) CC 5.0 150 EXTV VOLTAGE (V) Y CURRENT (μA) CC RISING 300μA LOAD 4.8 CC 5.2 AND INTV 100 4.6 SUPPL INTV CC EXTVCC FALLING 4.4 5.1 50 NO LOAD EXTV 4.2 0 4.0 5.0 5 10 15 20 25 30 35 –45 –25 –5 15 35 55 75 95 0 5 10 15 20 25 30 35 40 INPUT VOLTAGE (V) TEMPERATURE (°C) INPUT VOLTAGE (V) 38261 G10 38261 G11 38261 G12 FIGURE 13 CIRCUIT
Maximum Current Sense Voltage Sense Pins Total Input Maximum Current Sense vs ITH Voltage Bias Current Threshold vs Duty Cycle
100 60 120 PULSE SKIPPING FORCED CONTINUOUS 30 80 Burst Mode OPERATION 0 100 (RISING) –30 60 Burst Mode OPERATION (FALLING) –60 80 40 –90 –120 60 20 –150 –180 40 0 INPUT BIAS CURRENT (μA) –210 –20 –240 20 CURRENT SENSE THRESHOLD (mV) –270 10% DUTY CYCLE MAXIMUM CURRENT SENSE VOLTAGE (mV) –40 –300 0 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 0 1 2 3 4 5 6 7 8 9 10 0 10 20 30 40 50 60 70 80 90 100 ITH PIN VOLTAGE (V) VSENSE COMMON MODE VOLTAGE (V) DUTY CYCLE (%) 38261 G13 38261 G14 38261 G15 38261fb 5
