Datasheet LTC3827-1 (Analog Devices) - 5
| 制造商 | Analog Devices |
| 描述 | Low IQ, Dual, 2-Phase Synchronous Step-Down Controller |
| 页数 / 页 | 32 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS. Load Step. (Burst Mode Operation). … |
| 文件格式/大小 | PDF / 458 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS. Load Step. (Burst Mode Operation). (Forced Continuous Mode). (Pulse Skip Mode)
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LTC3827-1
TYPICAL PERFORMANCE CHARACTERISTICS Load Step Load Step Load Step (Burst Mode Operation) (Forced Continuous Mode) (Pulse Skip Mode)
VOUT VOUT VOUT 100mV/DIV 100mV/DIV 100mV/DIV AC AC AC COUPLED COUPLED COUPLED IL IL IL 2A/DIV 2A/DIV 2A/DIV 20μs/DIV 20μs/DIV 20μs/DIV 38271 G04 38271 G05 38271 G06 FIGURE 13 CIRCUIT FIGURE 13 CIRCUIT FIGURE 13 CIRCUIT VOUT = 3.3V VOUT = 3.3V VOUT = 3.3V
Inductor Current at Light Load Soft Start-Up Tracking Start-Up
VOUT2 VOUT2 2V/DIV 2V/DIV FORCED CONTINUOUS MODE VOUT1 VOUT1 2V/DIV 2V/DIV 2A/DIV BURST MODE PULSE SKIPPING MODE 4μs/DIV 20ms/DIV 20ms/DIV 38271 G07 38271 G08 38271 G09 FIGURE 13 CIRCUIT FIGURE 13 CIRCUIT FIGURE 13 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 5.30 200 5.2 VOLTAGES (V) CC 5.0 5.25 150 VOLTAGE (V) Y CURRENT (μA) 4.8 EXTVCC RISING CC 5.20 100 5.15 SUPPL NO LOAD AND INTV 4.6 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) 38271 G10 38271 G11 38271 G12 FIGURE 13 CIRCUIT 38271fe 5
TYPICAL PERFORMANCE CHARACTERISTICS Load Step Load Step Load Step (Burst Mode Operation) (Forced Continuous Mode) (Pulse Skip Mode)
VOUT VOUT VOUT 100mV/DIV 100mV/DIV 100mV/DIV AC AC AC COUPLED COUPLED COUPLED IL IL IL 2A/DIV 2A/DIV 2A/DIV 20μs/DIV 20μs/DIV 20μs/DIV 38271 G04 38271 G05 38271 G06 FIGURE 13 CIRCUIT FIGURE 13 CIRCUIT FIGURE 13 CIRCUIT VOUT = 3.3V VOUT = 3.3V VOUT = 3.3V
Inductor Current at Light Load Soft Start-Up Tracking Start-Up
VOUT2 VOUT2 2V/DIV 2V/DIV FORCED CONTINUOUS MODE VOUT1 VOUT1 2V/DIV 2V/DIV 2A/DIV BURST MODE PULSE SKIPPING MODE 4μs/DIV 20ms/DIV 20ms/DIV 38271 G07 38271 G08 38271 G09 FIGURE 13 CIRCUIT FIGURE 13 CIRCUIT FIGURE 13 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 5.30 200 5.2 VOLTAGES (V) CC 5.0 5.25 150 VOLTAGE (V) Y CURRENT (μA) 4.8 EXTVCC RISING CC 5.20 100 5.15 SUPPL NO LOAD AND INTV 4.6 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) 38271 G10 38271 G11 38271 G12 FIGURE 13 CIRCUIT 38271fe 5