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LTC3589-1 Fiches technique(PDF) 9 Page - Linear Technology |
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LTC3589-1 Fiches technique(HTML) 9 Page - Linear Technology |
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9 / 38 page ![]() LTC3676/LTC3676-1 9 3676ff For more information www.linear.com/LTC3676 Typical perForMance characTerisTics Oscillator Frequency Change vs VIN Step-Down Switching Regulators 1 and 2 Efficiency vs IOUT Step-Down Switching Regulators 1 and 2 Efficiency vs IOUT Step-Down Switching Regulators 3 and 4 Efficiency vs IOUT Buck RDS(ON) vs Temperature Buck RDS(ON) vs VIN LOAD CURRENT (mA) 1 0 20 30 40 50 60 70 10 100 3676 G08 80 90 100 BURST 10 1000 PULSE SKIPPING FORCED CONTINUOUS VIN = 3.3V VOUT = 1.2V LOAD CURRENT (mA) 1 0 20 30 40 50 60 70 10 100 3676 G09 80 90 100 BURST 10 1000 PULSE SKIPPING FORCED CONTINUOUS VIN = 5V VOUT = 1.2V LOAD CURRENT (mA) 1 0 20 30 40 50 60 VOUT = 2.5V 70 10 100 3676 G10 80 90 100 10 1000 VIN = 3.3V PULSE-SKIPPING MODE VOUT = 1.2V Step-Down Switching Regulator Load Step Step-Down Switching Regulator Current Limit vs Temperature LTC3676-1 VDDQIN, VTTR and VTT Start-Up PGOOD 5V/DIV VTTR 1V/DIV VTT (BUCK1) 1V/DIV VDDQIN 1V/DIV 400µs/DIV 3676 G14 100mV/DIV 500mA/DIV 10µs/DIV COUT = 44µF 3676 G15 VOUT = 1.2V ILOAD = 0.5A TO 1.5A VIN (V) 2.5 0 3676 G07 –0.4 –0.8 3.5 4.5 3.0 4.0 5.0 0.4 0.8 –0.2 –0.6 0.2 0.6 5.5 TEMPERATURE (°C) –50 100 150 150 3676 G11 50 0 0 50 100 250 200 BUCK 1, 2 PMOS BUCK 1, 2 NMOS BUCK 3, 4 NMOS BUCK 3, 4 PMOS VIN (V) 2.5 0 20 60 80 100 200 140 3.5 4.5 3676 G12 40 160 180 120 5.5 BUCK 1, 2 PMOS BUCK 3, 4 PMOS BUCK 3, 4 NMOS BUCK 1, 2 NMOS TEMPERATURE (°C) –50 1.5 2.0 2.5 3.0 3.5 4.0 4.5 0 50 100 150 3676 G13 BUCK 3, 4 BUCK 1, 2 |
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