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LT3790 数据表(PDF) 4 Page - Linear Technology |
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LT3790 数据表(HTML) 4 Page - Linear Technology |
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4 / 32 page  LT8390 4 8390fa For more information www.linear.com/LT8390 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = 12V, VEN/UVLO = 1.5V unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS Error Amplifier Full Scale Current Regulation V(ISP-ISN) VCTRL = 2V, VISP = 12V VCTRL = 2V, VISP = 0V l l 97 97 100 100 103 103 mV mV 1/10th Current Regulation V(ISP-ISN) VCTRL = 0.35V, VISP = 12V VCTRL = 0.35V, VISP = 0V l l 8 8 10 10 12 12 mV mV ISMON Monitor Output VISMON V(ISP-ISN) = 100mV, VISP = 12V/0V V(ISP-ISN) = 10mV, VISP = 12V/0V V(ISP-ISN) = 0mV, VISP = 12V/0V l l l 1.20 0.30 0.20 1.25 0.35 0.25 1.30 0.40 0.30 V V V ISP/ISN Input Common Mode Range l 0 60 V ISP/ISN Low Side to High Side Switchover Voltage VISP = VISN 1.8 V ISP/ISN High Side to Low Side Switchover Voltage VISP = VISN 1.7 V ISP Input Bias Current VLOADEN = 5V, VISP = VISN = 12V VLOADEN = 5V, VISP = VISN = 0V VEN/UVLO = 0V, VISP = VISN = 12V or 0V 23 –10 0 µA µA µA ISN Input Bias Current VLOADEN = 5V, VISP = VISN = 12V VLOADEN = 5V, VISP = VISN = 0V VEN/UVLO = 0V, VISP = VISN = 12V or 0V 23 –10 0 µA µA µA ISP/ISN Current Regulation Amplifier gm 2000 µs FB Regulation Voltage VC = 1.2V l 0.985 1.00 1.015 V FB Line Regulation VIN = 4V to 60V 0.2 0.5 % FB Load Regulation 0.2 0.8 % FB Voltage Regulation Amplifier gm 660 µS FB Input Bias Current FB in Regulation, Current Out of Pin 10 40 nA VC Output Impedance 10 MΩ VC Standby Leakage Current VC = 1.2V, VLOADEN = 0V –10 0 10 nA Current Comparator Maximum Current Sense Threshold V(LSP-LSN) Buck, VFB = 0.8V Boost, VFB = 0.8V l l 35 40 50 50 65 60 mV mV Reverse Current Sense Threshold V(LSP-LSN) Buck, VFB = 0.8V Boost, VFB = 0.8V 1 1 mV mV LSP Pin Bias Current VLSP = VLSN = 12V 60 µA LSN Pin Bias Current VLSP = VLSN = 12V 60 µA Fault FB Overvoltage Threshold (VFB) Rising l 1.08 1.1 1.12 V FB Overvoltage Hysteresis l 35 50 65 mV FB Short Threshold (VFB) Falling l 0.24 0.25 0.26 V FB Short Hysteresis Hysteresis l 35 50 65 mV ISP/ISN Over Current Threshold V(ISP-ISN) VISP = 12V 750 mV PGOOD Upper Threshold Offset from VFB Rising l 8 10 12 % PGOOD Lower Threshold Offset from VFB Falling l –12 –10 –8 % PGOOD Pull-Down Resistance 100 200 Ω SS Hard Pull-Down Resistance VEN/UVLO = 1.1V 100 200 Ω SS Pull-Up Current VFB = 0.4V, VSS = 0V 10.5 12.5 14.5 µA SS Pull-Down Current VFB = 0.1V, VSS = 2V 1.05 1.25 1.45 µA |
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