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LTC3775EUDTRPBF Datasheet(PDF) 3 Page - Linear Technology |
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LTC3775EUDTRPBF Datasheet(HTML) 3 Page - Linear Technology |
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3 / 32 page  LTC3775 3 3775f ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Input Supply VIN VIN Supply Voltage l 4.5 38 V IVIN Input DC Supply Current VFB = 0.7V (Note 5) VRUN = 0V 3.5 14 mA μA RUN/SHDN Pin VRUN RUN/SHDN Pin Enable Threshold 1.19 1.22 1.25 V VSHDN RUN/SHDN Pin Shutdown Threshold VRUN/SHDN Rising 0.74 V VSHDN(HYST) RUN/SHDN Pin Shutdown Threshold Hysteresis 140 mV IRUN RUN/SHDN Pin Source Current VRUN/SHDN = 0V VRUN/SHDN = 1.5V –1 –4 μA μA Error Amplifier VFB Feedback Pin Voltage l 0.597 0.5955 0.600 0.603 0.6045 V V ΔVFB Feedback Voltage Line Regulation 4.5V < VIN < 38V ±0.01 %/V ΔVOUT Output Voltage Load Regulation 1V < VCOMP < 2V (Note 6) 0.01 0.1 % IFB FB Pin Input Current VFB = 0.6V –50 50 nA ICOMP COMP Pin Output Current Sourcing Sinking –0.5 1 –1 mA mA f0dB Error Amplifier Unity-Gain Crossover Frequency (Note 6) 25 MHz Soft-Start ISS SS Pin Source Current VSS = 0V –1 μA RSS SS Pin Pull-Down Resistance in Current Limit 1.3 kΩ Current Limit ILIMB ILIMB Source Current l –9 –10 –11 μA ILIMT ILIMT Sink Current l 90 100 110 μA ISENSE SENSE Pin Input Current 1μA VILIMT(MAX) Topside Current Limit Threshold (VIN-SENSE) VILIMT = 0.1V l 90 100 110 mV VILIMB(MAX) Bottom Side Current Limit Threshold (PGND-SW) VILIMB = 0.5V l 80 100 120 mV INTVCC Low Dropout Voltage Regulator INTVCC LDO Regulator Output Voltage 4.9 5.2 5.5 V ΔVINTVCC(LINE) INTVCC Line Regulation 7.5V < VIN < 38V 0.01 %/V ΔVINTVCC(LOAD) INTVCC Load Regulation ΔIINTVCC = 0mA to 20mA –1 –0.1 % VDROPOUT INTVCC Regulator Dropout Voltage (VIN – VINTVCC)IINTVCC = 20mA 0.35 V VUVLO INTVCC UVLO Voltage INTVCC Rising Hysteresis 3.0 3.6 0.5 4.2 V V The l denotes the specifications which apply over the full operating junction temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, VRUN = 5V, unless otherwise specified. |
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