Datasheet LTC3827 (Analog Devices) - 6
| 制造商 | Analog Devices |
| 描述 | Low IQ, Dual, 2-Phase Synchronous Step-Down Controller |
| 页数 / 页 | 36 / 6 — TYPICAL PERFORMANCE CHARACTERISTICS. Total Input Supply Current. EXTVCC … |
| 文件格式/大小 | PDF / 461 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS. Total Input Supply Current. EXTVCC Switchover and INTVCC. vs Input Voltage
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LTC3827
TYPICAL PERFORMANCE CHARACTERISTICS 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) 3827 G10 3827 G11 3827 G12
Maximum Current Sense Voltage Sense Pins Total Input Maximum Current Sense vs ITH Voltage Bias Current Threshold 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 (%) 3827 G13 3827 G14 3827 G15
SENSE Pins Total Input Foldback Current Limit Quiescent Current vs Temperature Bias Current vs ITH
120 100 12 TRACK/SS = 1V PLLIN/MODE = 0V VSENSE = 3.3V 95 100 10 90 80 8 85 60 80 6 75 40 4 INPUT CURRENT (μA) QUIESCENT CURRENT (μA) 70 20 2 65 MAXIMUM CURRENT SENSE VOLTAGE (V) 0 60 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 –45 –30 –15 0 15 30 45 60 75 90 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 FEEDBACK VOLTAGE (V) TEMPERATURE (°C) ITH VOLTAGE (V) 3827 G16 3827 G17 3827 G18 3827ff 6
TYPICAL PERFORMANCE CHARACTERISTICS 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) 3827 G10 3827 G11 3827 G12
Maximum Current Sense Voltage Sense Pins Total Input Maximum Current Sense vs ITH Voltage Bias Current Threshold 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 (%) 3827 G13 3827 G14 3827 G15
SENSE Pins Total Input Foldback Current Limit Quiescent Current vs Temperature Bias Current vs ITH
120 100 12 TRACK/SS = 1V PLLIN/MODE = 0V VSENSE = 3.3V 95 100 10 90 80 8 85 60 80 6 75 40 4 INPUT CURRENT (μA) QUIESCENT CURRENT (μA) 70 20 2 65 MAXIMUM CURRENT SENSE VOLTAGE (V) 0 60 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 –45 –30 –15 0 15 30 45 60 75 90 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 FEEDBACK VOLTAGE (V) TEMPERATURE (°C) ITH VOLTAGE (V) 3827 G16 3827 G17 3827 G18 3827ff 6