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LTC3811EG-PBF Datasheet(PDF) 3 Page - Linear Technology |
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LTC3811EG-PBF Datasheet(HTML) 3 Page - Linear Technology |
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3 / 48 page  LTC3811 3 3811f ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Input Supply VIN Operating Input Voltage Range 4.5 30 V IQ Total Quiescent Supply Current Continuous Mode (Note 4) Shutdown Mode VFB1,2 = 0.7V VRUN1,2 = 0V ● ● 10.5 20 20 40 mA μA RUN Pin ON/OFF Control IRUN RUN Pin Input Leakage VRUN1,2 = 3.3V –1 1 μA VIL(RUN) Low Level RUN Input Threshold 0.3 V VIH(RUN) High Level RUN Input Threshold 1.8 V Error Amplifier Characteristics (Both Channels) VFB1, VFB2 Feedback Voltage Accuracy (Note 5) ● 598 597 600 602 603 mV mV IFB1, IFB2 Feedback Pin Input Current VCOMP = 1.25V (Note 5) –100 100 nA ΔVFB/ΔVIN Line Regulation 4.5V ≤ VIN ≤ 30V (Note 5) ● 0.002 0.02 %/V ΔVFB/ΔVCOMP Load Regulation ΔVCOMP = 1.25V to 1.5V (Note 5) ● –0.1 –0.01 % f0dB(EA) Error Amplifier Unity Gain Crossover Frequency (Note 6) 8 MHz VOH(EA) Error Amplifier Maximum Output Voltage (Internally Clamped) VFB = 0.54V, No Load 2.6 V VOL(EA) Error Amplifier Minimum Output Voltage VFB = 0.66V, No Load 10 mV VFB(OFF) FB Voltage Threshold to Disable Error Amplifier Output VINTVCC – VFB 0.3 V Soft-Start/Tracking ISS1, ISS2 SS/TRACK1, SS/TRACK2 Charging Currents VSS/TRACK1 = VSS/TRACK2 = 0.3V –2.5 μA RSS1, RSS2 SS/TRACK1, SS/TRACK2 Pull-Down Resistance in Shutdown VRUN1 = VRUN2 = 0V 1 kΩ Differential Amplifier AV Differential Mode Gain, ΔVDIFF/OUT/ΔVDIFF/IN ΔVDIFF/IN = 1V to 3.5V, IDIFF/OUT = –100μA 0.995 1.000 1.005 V/V VOS(DIFF) Output Offset Voltage, VDIFF/OUT – VDIFF/IN+ VDIFF/IN+ = 1.25V, VDIFF/IN– = 0V, IDIFF/OUT = –100μA –6 6 mV RIN Input Resistance Measured at VDIFF/IN+ 160 kΩ PSRRDIFF Power Supply Rejection Ratio 7V ≤ VIN ≤ 30V 100 dB VDM(DIFF) Maximum Differential Mode Input Voltage VDIFF/IN+ – VDIFF/IN–, Measured at VDIFF/OUT, IDIFF/OUT = –100μA 5.5 V IMAX+ Maximum Sink Current 2 mA IMAX– Maximum Source Current –2 mA f0dB(DIFF) Unity Gain Bandwidth (Note 6) 8 MHz Current Comparators VSENSE(MAX) Maximum Current Sense Threshold (VSENSE+ – VSENSE–) VFB = 0.575V, VCM = 1.25V VRNG = 0V VRNG = INTVCC VRNG = 2V 14 32.5 60 24 50 85 34 67.5 110 mV mV mV VSENSE(MIN) Minimum Current Sense Threshold (VSENSE+ – VSENSE–) VFB = 0.625V, VCM = 1.25V VRNG = 0V VRNG = INTVCC VRNG = 2V –21 –41 –67 mV mV mV The ● denotes the specifications which apply over the full operating junction temperature range, otherwise specifications are at TJ = 25°C. VIN = 12V, MODE/SYNC = 0V, unless otherwise specified. |
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