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LTC3604IUD Datasheet(PDF) 4 Page - Linear Technology |
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LTC3604IUD Datasheet(HTML) 4 Page - Linear Technology |
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4 / 24 page  LTC3604 4 3604f TYPICAL PERFORMANCE CHARACTERISTICS Efficiency vs Load Current Burst Mode Operation Efficiency vs Load Current Forced Continuous Mode Efficiency vs Frequency Forced Continuous Mode Reference Voltage vs Temperature ELECTRICAL CHARACTERISTICS Note 3: TJ is calculated from the ambient temperature, TA, and power dissipation, PD, according to the following formula: TJ = TA + (PD • θJA) where θJA = 45°C/W for the QFN package and θJA = 38°C/W for the MSOP package. Note 4: Maximum allowed current draw when used as a regulated output is 5mA. This supply is only intended to provide additional DC load current as needed and not intended to regulate large transient or ac behavior as these waveforms may impact LTC3604 operation. Efficiency vs Input Voltage Burst Mode Operation Note 5: This IC includes overtemperature protection that is intended to protect the device during momentary overload conditions. Junction temperature will exceed 125°C when overtemperature protection is active. Continuous operation above the specified maximum operating junction temperature may impair device reliability. Efficiency vs Load Current TA = 25°C, VIN = 12V, fO = 1MHz, L = 1.5μH unless otherwise noted. TEMPERATURE (°C) –50 –25 0.595 0.599 0.605 0 50 75 3604 G06 0.597 0.603 0.601 25 100 125 LOAD CURRENT (A) 30 90 100 20 10 80 50 70 60 40 0.001 0.1 1 10 3604 G01 0 0.01 VIN = 4V VIN = 8V VIN = 12V VOUT = 1.8V LOAD CURRENT (A) 30 90 100 20 10 80 50 70 60 40 0.001 0.1 1 10 3604 G02 0 0.01 VIN = 4V VIN = 8V VIN = 12V VOUT = 1.8V LOAD CURRENT (A) 30 90 100 20 10 80 50 70 60 40 0.001 0.1 1 10 3604 G03 0 0.01 VOUT = 3.3V VOUT = 5V BURST FORCED CONTINUOUS INPUT VOLTAGE (V) 4 75 80 85 10 14 3604 G04 70 65 60 68 12 90 95 100 16 ILOAD = 500mA ILOAD = 100mA ILOAD = 10mA ILOAD = 2.5A FREQUENCY (MHz) 0.5 82 84 86 88 90 92 94 1 1.5 2 2.5 3604 G05 3 VOUT = 1.8V ILOAD = 800mA L = 1.5μH L = 0.68μH |
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