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LT3790 数据表(PDF) 3 Page - Linear Technology |
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LT3790 数据表(HTML) 3 Page - Linear Technology |
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3 / 32 page  LT8390 3 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 Supply VIN Operating Voltage Range l 4 60 V VIN Quiescent Current VEN/UVLO = 0.3V VEN/UVLO = 1.1V Not Switching 1 270 2.1 2 2.8 µA µA mA VOUT Voltage Range l 0 60 V VOUT Quiescent Current VEN/UVLO = 0.3V, VOUT = 12V VEN/UVLO = 1.1V, VOUT = 12V Not Switching, VOUT = 12V 20 0.1 0.1 40 0.5 0.5 60 µA µA µA Linear Regulators INTVCC Regulation Voltage IINTVCC = 20mA 4.85 5.0 5.15 V INTVCC Load Regulation IINTVCC = 0mA to 80mA 1 4 % INTVCC Line Regulation IINTVCC = 20mA, VIN = 6V to 60V 1 4 % INTVCC Current Limit VINTVCC = 4.5V 80 110 160 mA INTVCC Dropout Voltage (VIN – INTVCC) IINTVCC = 20mA, VIN = 4V 160 mV INTVCC Undervoltage Lockout Threshold Falling 3.44 3.54 3.64 V INTVCC Undervoltage Lockout Hysteresis 0.24 V VREF Regulation Voltage IVREF = 100µA l 1.97 2.00 2.03 V VREF Load Regulation IVREF = 0mA to 1mA 0.4 1 % VREF Line Regulation IVREF = 100µA, VIN = 4V to 60V 0.1 0.2 % VREF Current Limit VREF = 1.8V 2 2.5 3.2 mA VREF Undervoltage Lockout Threshold Falling 1.78 1.84 1.90 V VREF Undervoltage Lockout Hysteresis 50 mV Control Inputs/Outputs EN/UVLO Shutdown Threshold l 0.3 0.6 1.0 V EN/UVLO Enable Threshold Falling l 1.196 1.220 1.244 V EN/UVLO Enable Hysteresis 13 mV EN/UVLO Hysteresis Current VEN/UVLO = 0.3V VEN/UVLO = 1.1V VEN/UVLO = 1.3V –0.1 2.2 –0.1 0 2.5 0 0.1 2.8 0.1 µA µA µA CTRL Input Bias Current VCTRL = 0.75V, Current Out of Pin 0 20 50 nA CTRL Latch-Off Threshold Falling l 285 300 315 mV CTRL Latch-Off Hysteresis 25 mV Load Switch Driver LOADEN Threshold Rising l 1.3 1.4 1.5 V LOADEN Hysteresis 220 mV Minimum VOUT for LOADTG to be On VLOADEN = 5V 2.4 3 V LOADTG On Voltage V(VOUT-LOADTG) VOUT = 12V 4.6 5 5.4 V LOADTG Off Voltage V(VOUT-LOADTG) VOUT = 12V –0.1 0 0.1 V LOADEN to LOADTG Turn On Propagation Delay LOADEN to LOADTG Turn Off Propagation Delay CLOADTG = 3.3nF to VOUT, 50% to 50% CLOADTG = 3.3nF to VOUT, 50% to 50% 90 40 ns ns LOADTG Turn On Fall Time LOADTG Turn Off Rise Time CLOADTG = 3.3nF to VOUT, 10% to 90% CLOADTG = 3.3nF to VOUT, 90% to 10% 300 10 ns ns |
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