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LTC4081EDD-TRPBF Datasheet(PDF) 6 Page - Linear Technology |
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LTC4081EDD-TRPBF Datasheet(HTML) 6 Page - Linear Technology |
6 / 24 page LTC4081 6 4081f 20 25 35 15 10 5 0 30 4081 G16 BATTERY VOLTAGE (V) 2.5 4.5 3.0 3.5 4.0 IOUT = 1mA VOUT = 1.8V L = 10 μH TEMPERATURE ( °C) 0.80 0.90 1.05 0.85 1.00 0.95 4081 G10 –50 30 –10 –30 50 70 10 90 BATTERY VOLTAGE (V) 2.5 2.26 2.27 2.28 4.0 4081 G11 2.25 2.24 3.0 3.5 4.5 2.23 2.22 TEMPERATURE ( °C) –60 1.8 1.9 2.0 2.1 2.2 –20 20 60 100 2.3 2.4 –40 0 40 80 4081 G12 VBAT = 2.7V VBAT = 4.5V VBAT = 3.8V LOAD CURRENT (mA) 0.01 40 60 80 0.1 10 100 1 1000 20 0 100 1 10 100 0.1 0.01 1000 4081 G13 VBAT = 3.8V VOUT = 1.8V L = 10 μH C = 4.7 μF EFFICIENCY (BURST) POWER LOSS (BURST) EFFICIENCY (PWM) POWER LOSS (PWM) BATTERY VOLTAGE (V) 2.5 1.780 1.785 1.790 1.795 1.800 1.805 1.810 3.0 3.5 4.0 4.5 4081 G14 PWM MODE IOUT = 1mA VOUT SET FOR 1.8V Burst Mode OPERATION TEMPERATURE (˚C) –50 1.800 1.805 1.810 10 50 1.795 1.790 –30 –10 30 70 90 1.785 1.780 4081 G15 PWM MODE Burst Mode OPERATION IOUT = 1mA VOUT SET FOR 1.8V No-Load Buck Input Current (Burst Mode Operation) vs Battery Voltage Normalized Charge Termination Time vs Temperature Buck Oscillator Frequency vs Battery Voltage Buck Oscillator Frequency vs Temperature Buck Efficiency vs Load Current (VOUT = 1.8V) Buck Output Voltage vs Battery Voltage Buck Output Voltage vs Temperature 70 40 20 10 0 80 60 50 30 4081 G09 ICHRG = 5mA TEMPERATURE ( °C) –50 30 –10 –30 50 70 10 90 ⎯C⎯H⎯R⎯G Pin Output Low Voltage vs Temperature TYPICAL PERFORMANCE CHARACTERISTICS (T A = 25°C, VCC = 5V, VBAT = 3.8V, unless otherwise specified) Buck Efficiency vs Load Current (VOUT = 1.5V) LOAD CURRENT (mA) 0.01 40 60 80 0.1 10 100 1 1000 20 0 100 1 10 100 0.1 0.01 1000 4081 G13a VBAT = 3.8V VOUT = 1.5V L = 10 μH C = 4.7 μF EFFICIENCY (PWM) POWER LOSS (PWM) EFFICIENCY (BURST) POWER LOSS (BURST) |
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