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LTC3868EUHTRPBF Datasheet(PDF) 5 Page - Linear Technology |
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LTC3868EUHTRPBF Datasheet(HTML) 5 Page - Linear Technology |
5 / 38 page LTC3868 3868fb Typical perForMance characTerisTics Efficiency and Power Loss vs Output Current Efficiency vs Output Current Load Step (Burst Mode Operation) Load Step (Forced Continuous Mode) Load Step (Pulse-Skipping Mode) Inductor Current at Light Load Soft Start-Up Efficiency vs Input Voltage OUTPUT CURRENT (A) 0.0001 40 50 60 70 80 0.001 0.01 0.1 1 10 3868 G02 30 20 10 0 90 100 VIN = 5V VIN = 12V VOUT = 3.3V FIGURE 12 CIRCUIT INPUT VOLTAGE (V) 0 90 92 94 3868 G03 88 86 84 80 10 20 5 15 25 28 82 98 96 FIGURE 12 CIRCUIT VOUT = 3.3V IOUT = 4A OUTPUT CURRENT (A) 0.0001 40 50 60 70 80 0.001 0.01 0.1 1 10 3868 G01 30 20 10 0 90 100 10 100 1000 1 0.1 10000 FIGURE 12 CIRCUIT VIN = 12V VOUT = 3.3V Burst Mode OPERATION PULSE- SKIPPING FCM VOUT 100mV/DIV AC- COUPLED IL 2A/DIV 20µs/DIV 3868 G04 VOUT = 3.3V FIGURE 12 CIRCUIT VOUT 100mV/DIV AC- COUPLED IL 2A/DIV 20µs/DIV 3868 G05 VOUT = 3.3V FIGURE 12 CIRCUIT VOUT 100mV/DIV AC- COUPLED IL 2A/DIV 20µs/DIV 3868 G06 VOUT = 3.3V FIGURE 12 CIRCUIT Burst Mode OPERATION 2A/DIV FORCED CONTINUOUS MODE PULSE- SKIPPING MODE 2µs/DIV 3868 G07 VOUT = 3.3V ILOAD = 200µA FIGURE 12 CIRCUIT VOUT2 2V/DIV VOUT1 2V/DIV 20ms/DIV 3868 G08 FIGURE 12 CIRCUIT |
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