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LTC1878 Datasheet(PDF) 4 Page - Linear Technology |
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LTC1878 Datasheet(HTML) 4 Page - Linear Technology |
4 / 16 page 4 LTC1878 Reference Voltage vs Temperature TYPICAL PERFOR A CE CHARACTERISTICS Oscillator Frequency vs Temperature Efficiency vs Output Current OUTPUT CURRENT (mA) 75 85 95 70 80 90 0.1 10 100 1000 1878 G04 65 1 VIN = 3V VIN = 6V VIN = 3.6V VIN = 4.2V VOUT = 1.8V L = 10 µH TEMPERATURE ( °C) –50 0.814 0.809 0.804 0.799 0.794 0.789 0.784 25 75 1878 G05 –25 0 50 100 125 VIN = 3.6V TEMPERATURE ( °C) –50 605 595 585 575 565 555 545 535 525 515 505 495 100 75 1878 G06 –25 0 50 25 125 VIN = 3.6V Oscillator Frequency vs Supply Voltage SUPPLY VOLTAGE (V) 0 545 535 525 565 555 8 1878 G07 515 505 495 2 4 6 605 595 585 575 LOAD CURRENT (mA) 0 1.77 1.78 1.80 1.81 1.82 200 400 500 900 1878 G08 1.79 100 300 600 700 800 1.83 PULSE SKIPPING MODE VIN = 3.6V L = 10 µH INPUT VOLTAGE (V) 1 0 0.5 0.6 0.7 5678 1878 G09 0.4 0.3 0 0.1 2 3 4 0.2 0.9 0.8 SYNCHRONOUS SWITCH MAIN SWITCH Reference Voltage vs Temperature Output Voltage vs Load Current RDS(ON) vs Input Voltage RDS(ON) vs Temperature DC Supply Current vs Input Voltage DC Supply Current vs Temperature TEMPERATURE ( °C) –50 –25 0.3 0.4 0.6 0.7 0.8 75 100 1.2 1878 G10 0.5 0 25 50 125 0.9 1.0 1.1 VIN = 3V VIN = 5V SYNCHRONOUS SWITCH MAIN SWITCH INPUT VOLTAGE (V) 01 0 100 250 2 4 5 1878 G11 50 200 150 3 6 7 VOUT = 1.8V PULSE SKIPPING MODE Burst Mode OPERATION TEMPERATURE ( °C) –50 300 250 200 150 100 50 0 25 75 1878 G12 –25 0 50 125 100 PULSE SKIPPING MODE Burst Mode OPERATION VIN = 3.6V |
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