Datasheet LTC3835-1 (Analog Devices) - 5
| 制造商 | Analog Devices |
| 描述 | Low IQ Synchronous Step-Down Controller |
| 页数 / 页 | 28 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. … |
| 文件格式/大小 | PDF / 299 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Inductor Current at Light Load. Soft Start-Up
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LTC3835-1
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Inductor Current at Light Load Soft Start-Up Tracking Start-Up
V FORCED OUT2 2V/DIV CONTIN- UOUS (MASTER) MODE VOUT1 2V/DIV 2A/DIV Burst Mode (SLAVE) OPERATION VOUT PULSE- 1V/DIV SKIPPING MODE 38351 G07 38351 G08 38351 G09 4μs/DIV 20ms/DIV 20ms/DIV FIGURE 10 CIRCUIT FIGURE 10 CIRCUIT FIGURE 10 CIRCUIT VOUT = 3.3V ILOAD = 300μA
Total Input Supply Current EXTVCC Switchover and INTVCC vs Input Voltage Voltages vs Temperature INTVCC Line Regulation
350 6.0 5.50 5.8 5.45 300 5.6 5.40 250 5.4 INTV 5.35 300μA LOAD CC 5.2 5.30 200 VOLTAGES (V) CC 5.0 5.25 150 VOLTAGE (V) Y CURRENT (μA) 4.8 EXTVCC RISING CC 5.20 100 AND INTV 4.6 5.15 SUPPL NO LOAD INTV CC 4.4 EXTVCC FALLING 5.10 50 EXTV 4.2 5.05 0 4.0 5.00 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) 38351 G10 38351 G11 38351 G12
Maximum Current Sense Voltage Sense Pins Total Input Maximum Current Sense Threshold vs ITH Voltage Bias Current vs Duty Cycle
100 200 120 PULSE SKIPPING FORCED CONTINUOUS 100 80 BURST MODE (RISING) 100 BURST MODE (FALLING) 0 60 –100 80 40 –200 60 20 –300 –400 40 0 INPUT CURRENT (μA) –500 –20 20 CURRENT SENSE THRESHOLD (mV) –600 CURRENT SENSE THRESHOLD (mV) 10% DUTY CYCLE –40 –700 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 (%) 38351 G13 38351 G14 38351 G15 38351fc 5
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Inductor Current at Light Load Soft Start-Up Tracking Start-Up
V FORCED OUT2 2V/DIV CONTIN- UOUS (MASTER) MODE VOUT1 2V/DIV 2A/DIV Burst Mode (SLAVE) OPERATION VOUT PULSE- 1V/DIV SKIPPING MODE 38351 G07 38351 G08 38351 G09 4μs/DIV 20ms/DIV 20ms/DIV FIGURE 10 CIRCUIT FIGURE 10 CIRCUIT FIGURE 10 CIRCUIT VOUT = 3.3V ILOAD = 300μA
Total Input Supply Current EXTVCC Switchover and INTVCC vs Input Voltage Voltages vs Temperature INTVCC Line Regulation
350 6.0 5.50 5.8 5.45 300 5.6 5.40 250 5.4 INTV 5.35 300μA LOAD CC 5.2 5.30 200 VOLTAGES (V) CC 5.0 5.25 150 VOLTAGE (V) Y CURRENT (μA) 4.8 EXTVCC RISING CC 5.20 100 AND INTV 4.6 5.15 SUPPL NO LOAD INTV CC 4.4 EXTVCC FALLING 5.10 50 EXTV 4.2 5.05 0 4.0 5.00 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) 38351 G10 38351 G11 38351 G12
Maximum Current Sense Voltage Sense Pins Total Input Maximum Current Sense Threshold vs ITH Voltage Bias Current vs Duty Cycle
100 200 120 PULSE SKIPPING FORCED CONTINUOUS 100 80 BURST MODE (RISING) 100 BURST MODE (FALLING) 0 60 –100 80 40 –200 60 20 –300 –400 40 0 INPUT CURRENT (μA) –500 –20 20 CURRENT SENSE THRESHOLD (mV) –600 CURRENT SENSE THRESHOLD (mV) 10% DUTY CYCLE –40 –700 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 (%) 38351 G13 38351 G14 38351 G15 38351fc 5