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LTC3547B Datasheet(PDF) 3 Page - Linear Technology |
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LTC3547B Datasheet(HTML) 3 Page - Linear Technology |
3 / 16 page LTC3547B 3 3547bfb VIN (V) 2.5 100 90 80 70 60 50 40 10 20 30 45 3547b G02 3 3.5 4.5 5.5 VOUT = 1.8V IOUT = 0.1mA IOUT = 1mA IOUT = 10mA IOUT = 100mA IOUT = 300mA 10μs/DIV VOUT 50mV/DIV IL 50mA/DIV SW, AC-COUPLED 5V/DIV 3547b G01 VIN = 3.6V VOUT = 1.8V ILOAD = 1mA TEMPERATURE (ºC) –50 400 350 300 250 200 150 100 25 75 3547b G03 –25 0 50 100 ILOAD = 0A VIN = 5.5V VIN = 2.7V SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS ΔVLINEREG Reference Voltage Line Regulation VIN = 2.5V to 5.5V 0.3 0.5 %/V ΔVLOADREG Output Voltage Load Regulation ILOAD = 50mA to 300mA 0.5 % IS Input DC Supply Current Active Mode (Note 4) Shutdown VFB1 = VFB2 = 0.95 × VFBREG RUN1 = RUN2 = 0V, VIN = 5.5V 450 0.1 700 1 μA μA fOSC Oscillator Frequency VFB = 0.6V ● 1.8 2.25 2.7 MHz ILIM Peak Switch Current Limit Channel 1 (300mA) Channel 2 (300mA) VIN = 2.5V, VFB < VFBREG, Duty Cycle < 35% 400 400 550 550 mA mA RDS(ON) Channel 1 (Note 3) Top Switch On-Resistance Bottom Switch On-Resistance Channel 2 (Note 3) Top Switch On-Resistance Bottom Switch On-Resistance VIN = 3.6V, ISW = 100mA VIN = 3.6V, ISW = 100mA VIN = 3.6V, ISW = 100mA VIN = 3.6V, ISW = 100mA 0.8 0.75 0.8 0.75 1.05 1.05 1.05 1.05 Ω Ω Ω Ω ISW(LKG) Switch Leakage Current VIN = 5V, VRUN = 0V 0.01 1 μA tSOFTSTART Soft-Start Time VFB From 10% to 90% Full-Scale 0.450 0.650 0.850 ms VRUN RUN Threshold High ● 0.4 1 1.2 V IRUN RUN Leakage Current ● 0.01 1 μA The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VCC = 3.6V, unless otherwise noted. ELECTRICAL CHARACTERISTICS Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: The LTC3547BE is guaranteed to meet specified performance from 0°C to 85°C. Specifications over the –40°C and 85°C operating temperature range are assured by design, characterization and correlation with statistical process controls. The LTC3547BI is guaranteed over the –40°C to 125°C operating temperature range. Note 3: The DFN switch on-resistance is guaranteed by correlation to wafer level measurements. Note 4: Dynamic supply current is higher due to the internal gate charge being delivered at the switching frequency. Note 5: Guaranteed by long-term current density limitations. Note 6: 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. Pulse Skip Mode Operation Efficiency vs Input Voltage Supply Current vs Temperature TYPICAL PERFOR A CE CHARACTERISTICS T A = 25°C unless otherwise specified. |
Similar Part No. - LTC3547B_15 |
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Similar Description - LTC3547B_15 |
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