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LTC3886 Datasheet(PDF) 10 Page - Linear Technology |
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LTC3886 Datasheet(HTML) 10 Page - Linear Technology |
10 / 116 page LTC3886 10 3886f For more information www.linear.com/LTC3886 Typical perForMance characTerisTics EXTVCC Switchover vs Temperature Load Step (Forced Continuous Mode) Load Step (Pulse-Skipping Mode) Inductor Current at Light Load Start-Up into a Pre-Biased Load Soft-Start Ramp Efficiency vs Load Current, VOUT = 12V Efficiency vs Load Current, VOUT = 5V Efficiency and Power Loss vs Input Voltage LOAD CURRENT (A) 30 90 100 20 10 80 50 70 60 40 0.01 1 10 100 3886 G01 0 0.1 CCM DCM VIN = 48V VOUT = 12V fSW = 150kHz L = 6.8µH DCR = 1.86m LOAD CURRENT (A) 30 90 100 20 10 80 50 70 60 40 0.01 1 10 100 3883 G02 0 0.1 CCM DCM VIN = 48V VOUT = 5V fSW = 150kHz L = 6.8µH DCR = 1.86m VIN (V) 18 94 95 96 97 98 2 4 6 8 10 28 38 3886 G03 48 EFFICIENCY POWER LOSS VIN = 12V fSW = 150kHz L = 6.8µH DCR = 1.86m FORCED CONTINUOUS MODE 2A/DIV PULSE-SKIPPING MODE 2A/DIV 1µs/DIV VIN = 12V VOUT = 1.8V ILOAD = 100µA 3886 G07 ILOAD 5A/DIV INDUCTOR CURRENT 5A/DIV VOUT 100mV/DIV AC-COUPLED 50µs/DIV VIN = 12V VOUT = 1.8V 0.3A TO 5A STEP 3886 G05 ILOAD 5A/DIV INDUCTOR CURRENT 5A/DIV VOUT 100mV/DIV AC-COUPLED 50µs/DIV VIN = 12V VOUT = 1.8V 0.3A TO 5A STEP 3886 G06 RUN 2V/DIV VOUT 1V/DIV 5ms/DIV tRISE = 10ms tDELAY = 5ms VOUT = 2V 3886 G08 RUN 2V/DIV VOUT 1V/DIV 5ms/DIV tRISE = 10ms tDELAY = 5ms 3886 G09 TA = 25C, VIN = 16V, EXTVCC = 0V, unless otherwise noted. TEMPERATURE (°C) –50 –25 4.700 4.704 4.702 0 100 4.710 4.708 4.706 25 50 75 125 3886 G04 |
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