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LTC3859IFE-PBF Datasheet(PDF) 9 Page - Linear Technology |
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LTC3859IFE-PBF Datasheet(HTML) 9 Page - Linear Technology |
9 / 40 page LTC3859 9 3859f TYPICAL PERFORMANCE CHARACTERISTICS Buck Foldback Current Limit Oscillator Frequency vs Temperature Undervoltage Lockout Threshold vs Temperature Shutdown (RUN) Threshold vs Temperature Charge Pump Charging Current vs Operating Frequency Charge Pump Charging Current vs Switch Voltage Shutdown Current vs Temperature Shutdown Current vs Input Voltage Quiescent Current vs Temperature TEMPERATURE (°C) –45 22 20 16 14 10 18 12 8 30 55 80 105 130 –20 3859 G28 5 INPUT VOLTAGE (V) 5 25 20 15 5 10 0 20 25 30 35 40 10 3859 G29 15 TEMPERATURE (°C) –45 100 90 80 50 60 70 40 30 55 80 105 130 ONE CHANNEL ON –20 3859 G30 ALL CHANNELS ON 5 FEEDBACK VOLTAGE (mV) 0 70 60 50 20 10 30 40 65 55 45 15 5 25 35 0 300 400 500 600 700 800 100 3859 G31 200 TEMPERATURE (°C) –45 600 550 500 350 400 450 300 30 55 80 105 130 –20 3859 G32 FREQ = INTVCC FREQ = GND 5 TEMPERATURE (°C) –45 4.4 4.3 4.2 3.6 3.8 4.0 3.4 3.5 3.7 3.9 4.1 30 55 80 105 130 –20 3859 G33 RISING FALLING 5 TEMPERATURE (°C) –45 1.40 1.35 1.30 1.20 1.00 1.15 1.10 1.05 1.25 30 55 80 105 130 –20 3859 G34 RUN1 RISING RUN2,3 RISING RUN1 FALLING RUN2,3 FALLING 5 OPERATING FREQUENCY (kHz) 100 100 80 90 60 70 20 30 0 10 40 50 400 500 600 700 800 200 3859 G35 –45°C 25°C 130°C 300 VBOOST3 = 16V VSW3 = 12V SWITCH VOLTAGE (V) 5 100 80 90 60 70 20 30 0 10 40 50 20 25 30 35 40 10 3859 G36 FREQ = 0V FREQ = INTVCC 15 VBOOST3 – VSW3 = 4V |
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