Datasheet LTC3879 (Analog Devices) - 7
| 制造商 | Analog Devices |
| 描述 | Fast, Wide Operating Range No RSENSE Step-Down Controller |
| 页数 / 页 | 28 / 7 — TYPICAL PERFORMANCE CHARACTERISTICS. Shutdown Current. Error Amplifi er gm … |
| 文件格式/大小 | PDF / 314 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS. Shutdown Current. Error Amplifi er gm vs Temperature. vs Input Voltage
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LTC3879
TYPICAL PERFORMANCE CHARACTERISTICS Shutdown Current Error Amplifi er gm vs Temperature vs Input Voltage Quiescent Current vs INTVCC
2.0 35 4.0 1.9 3.5 1.8 30 3.0 1.7 2.5 1.6 25 (mS) 1.5 2.0 g m 1.4 20 1.5 1.3 INPUT CURRENT (μA) 1.0 1.2 15 QUIESCENT CURRENT (mA) 1.1 0.5 1.0 10 0 –50 0 50 100 5 10 15 20 25 30 35 40 4.0 4.5 5.0 5.5 6.0 6.5 7.0 TEMPERATURE (°C) INPUT VOLTAGE (V) INTVCC (V) 3879 G18 3879 G19 3879 G20
INTVCC Load Regulation INTVCC Dropout INTVCC vs INTVCC ILOAD
0 0 6 VIN = 12V VIN = 4.5V –0.2 –200 5 –0.4 INTV INTV –0.6 CC CC –400 4 I I LOAD LOAD –0.8 FALLING RISING (%) (V) CC –1.0 –600 CC 3 V DO NOT EXCEED ≥50mA INTV $ –1.2 INT CONTINUOUS –800 2 –1.4 DROPOUT VOLTAGE (mV) VIN = 18V CC ILIMIT = 150mA, –1.6 INTVCC > 0.7V INTV –1000 1 ILIMIT = 22mA, –1.8 INTVCC < 0.7V –2.0 –1200 0 0 10 20 30 40 50 0 10 20 30 40 50 0 50 100 150 200 INTVCC LOAD CURRENT (mA) INTVCC LOAD CURRENT (mA) ILOAD (mA) 3879 G21 3879 G22 3879 G23
TRACK/SS Pin Current Feedback Reference Voltage vs Temperature vs Temperature
1.4 0.606 VIN = 12V VOUT = 1.2V MODE = INTV 0.604 CC 1.2 TAGE (V) 0.602 1.0 0.600 0.598 0.8 TRACK/SS PIN CURRENT (μA) 0.596 FEEDBACK REFERENCE VOL 0.6 0.594 –50 0 50 100 –50 –30 –10 10 30 50 70 90 110 TEMPERATURE (°C) TEMPERATURE (°C) 3879 G24 3879 G25 3879f 7
TYPICAL PERFORMANCE CHARACTERISTICS Shutdown Current Error Amplifi er gm vs Temperature vs Input Voltage Quiescent Current vs INTVCC
2.0 35 4.0 1.9 3.5 1.8 30 3.0 1.7 2.5 1.6 25 (mS) 1.5 2.0 g m 1.4 20 1.5 1.3 INPUT CURRENT (μA) 1.0 1.2 15 QUIESCENT CURRENT (mA) 1.1 0.5 1.0 10 0 –50 0 50 100 5 10 15 20 25 30 35 40 4.0 4.5 5.0 5.5 6.0 6.5 7.0 TEMPERATURE (°C) INPUT VOLTAGE (V) INTVCC (V) 3879 G18 3879 G19 3879 G20
INTVCC Load Regulation INTVCC Dropout INTVCC vs INTVCC ILOAD
0 0 6 VIN = 12V VIN = 4.5V –0.2 –200 5 –0.4 INTV INTV –0.6 CC CC –400 4 I I LOAD LOAD –0.8 FALLING RISING (%) (V) CC –1.0 –600 CC 3 V DO NOT EXCEED ≥50mA INTV $ –1.2 INT CONTINUOUS –800 2 –1.4 DROPOUT VOLTAGE (mV) VIN = 18V CC ILIMIT = 150mA, –1.6 INTVCC > 0.7V INTV –1000 1 ILIMIT = 22mA, –1.8 INTVCC < 0.7V –2.0 –1200 0 0 10 20 30 40 50 0 10 20 30 40 50 0 50 100 150 200 INTVCC LOAD CURRENT (mA) INTVCC LOAD CURRENT (mA) ILOAD (mA) 3879 G21 3879 G22 3879 G23
TRACK/SS Pin Current Feedback Reference Voltage vs Temperature vs Temperature
1.4 0.606 VIN = 12V VOUT = 1.2V MODE = INTV 0.604 CC 1.2 TAGE (V) 0.602 1.0 0.600 0.598 0.8 TRACK/SS PIN CURRENT (μA) 0.596 FEEDBACK REFERENCE VOL 0.6 0.594 –50 0 50 100 –50 –30 –10 10 30 50 70 90 110 TEMPERATURE (°C) TEMPERATURE (°C) 3879 G24 3879 G25 3879f 7