Datasheet LTC3827 (Analog Devices) - 7
| 制造商 | Analog Devices |
| 描述 | Low IQ, Dual, 2-Phase Synchronous Step-Down Controller |
| 页数 / 页 | 36 / 7 — TYPICAL PERFORMANCE CHARACTERISTICS. TRACK/SS Pull-Up Current. Shutdown … |
| 文件格式/大小 | PDF / 461 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS. TRACK/SS Pull-Up Current. Shutdown (RUN) Threshold. Regulated Feedback Voltage
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LTC3827
TYPICAL PERFORMANCE CHARACTERISTICS TRACK/SS Pull-Up Current Shutdown (RUN) Threshold Regulated Feedback Voltage vs Temperature vs Temperature vs Temperature
1.20 1.00 808 1.15 0.95 806 0.90 1.10 804 0.85 1.05 802 0.80 1.00 0.75 800 0.95 0.70 798 RUN PIN VOLTAGE (V) 0.65 TRACK/SS CURRENT (μA) 0.90 796 0.60 0.85 794 0.55 REGULATED FEEDBACK VOLTAGE (mV) 0.80 0.50 792 –45 –30 –15 0 15 30 45 60 75 90 –45 –30 –15 0 15 30 45 60 75 90 –45 –30 –15 0 15 30 45 60 75 90 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3827 G19 3827 G20 3827 G21
Sense Pins Total Input Current Shutdown Current Oscillator Frequency vs Temperature vs Input Voltage vs Temperature
200 25 800 VOUT = 10V 100 700 VOUT = 3.3V 0 20 600 –100 VPLLLPF = INTVCC 500 –200 15 VPLLLPF = FLOAT –300 400 –400 10 300 V FREQUENCY (kHz) PLLLPF = GND INPUT CURRENT (μA) –500 INPUT CURRENT (μA) 200 –600 V 5 OUT = OV 100 –700 –800 0 0 –45 –30 –15 0 15 30 45 60 75 90 5 10 15 20 25 30 35 –45 –25 –5 15 35 55 75 95 TEMPERATURE (°C) INPUT VOLTAGE (V) TEMPERATURE (°C) 3827 G22 3827 G23 3827 G24
Undervoltage Lockout Threshold Oscillator Frequency Shutdown Current vs Temperature vs Input Voltage vs Temperature
4.2 404 12 4.1 402 10 4.0 3.9 400 8 RISING 3.8 3.7 398 6 VOLTAGE (V) CC 3.6 FREQUENCY (kHz) 396 4 INTV 3.5 FALLING SHUTDOWN CURRENT (μA) 3.4 394 2 3.3 3.2 392 0 –45 –30 –15 0 15 30 45 60 75 90 5 10 15 20 25 30 35 –45 –30 –15 0 15 30 45 60 75 90 TEMPERATURE (°C) INPUT VOLTAGE (V) TEMPERATURE (°C) 3827 G25 3827 G26 3827 G27 3827ff 7
TYPICAL PERFORMANCE CHARACTERISTICS TRACK/SS Pull-Up Current Shutdown (RUN) Threshold Regulated Feedback Voltage vs Temperature vs Temperature vs Temperature
1.20 1.00 808 1.15 0.95 806 0.90 1.10 804 0.85 1.05 802 0.80 1.00 0.75 800 0.95 0.70 798 RUN PIN VOLTAGE (V) 0.65 TRACK/SS CURRENT (μA) 0.90 796 0.60 0.85 794 0.55 REGULATED FEEDBACK VOLTAGE (mV) 0.80 0.50 792 –45 –30 –15 0 15 30 45 60 75 90 –45 –30 –15 0 15 30 45 60 75 90 –45 –30 –15 0 15 30 45 60 75 90 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3827 G19 3827 G20 3827 G21
Sense Pins Total Input Current Shutdown Current Oscillator Frequency vs Temperature vs Input Voltage vs Temperature
200 25 800 VOUT = 10V 100 700 VOUT = 3.3V 0 20 600 –100 VPLLLPF = INTVCC 500 –200 15 VPLLLPF = FLOAT –300 400 –400 10 300 V FREQUENCY (kHz) PLLLPF = GND INPUT CURRENT (μA) –500 INPUT CURRENT (μA) 200 –600 V 5 OUT = OV 100 –700 –800 0 0 –45 –30 –15 0 15 30 45 60 75 90 5 10 15 20 25 30 35 –45 –25 –5 15 35 55 75 95 TEMPERATURE (°C) INPUT VOLTAGE (V) TEMPERATURE (°C) 3827 G22 3827 G23 3827 G24
Undervoltage Lockout Threshold Oscillator Frequency Shutdown Current vs Temperature vs Input Voltage vs Temperature
4.2 404 12 4.1 402 10 4.0 3.9 400 8 RISING 3.8 3.7 398 6 VOLTAGE (V) CC 3.6 FREQUENCY (kHz) 396 4 INTV 3.5 FALLING SHUTDOWN CURRENT (μA) 3.4 394 2 3.3 3.2 392 0 –45 –30 –15 0 15 30 45 60 75 90 5 10 15 20 25 30 35 –45 –30 –15 0 15 30 45 60 75 90 TEMPERATURE (°C) INPUT VOLTAGE (V) TEMPERATURE (°C) 3827 G25 3827 G26 3827 G27 3827ff 7