Datasheet LT8710 (Analog Devices) - 3
| 制造商 | Analog Devices |
| 描述 | Synchronous SEPIC/Inverting/Boost Controller with Output Current Control |
| 页数 / 页 | 44 / 3 — e lecTrical characTerisTics The. denotes the specifications which apply … |
| 文件格式/大小 | PDF / 657 Kb |
| 文件语言 | 英语 |
e lecTrical characTerisTics The. denotes the specifications which apply over the full operating
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LT8710
e lecTrical characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications for each channel are at TA = 25°C. VIN = 12V, VEN/FBIN = 12V, VBIAS = 12V, unless otherwise noted (Note 2). PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Operating Input Voltage VIN OR VBIAS l 4.25 4.5 V VIN if VBIAS ≥ 4.5V 0 V Quiescent Current, IVIN VBIAS = VISN = 7.5V, Not Switching 4 5.5 mA VBIAS = 6.3V, VINTVEE = VISN = 0V, Not Switching 5.5 7.5 mA Quiescent Current in Shutdown VEN/FBIN = 0V 0 1 µA EN/FBIN Active Mode EN/FBIN Rising l 1.64 1.7 1.76 V EN/FBIN Chip Enable EN/FBIN Rising l 1.22 1.3 1.38 V EN/FBIN Falling l 1.18 1.26 1.34 V EN/FBIN Chip Enable Hysteresis 44 mV EN/FBIN Input Voltage Low Shutdown Mode l 0.3 V EN/FBIN Pin Bias Current VEN/FBIN = 3V 44 60 µA VEN/FBIN = 1.7V 14 19.5 25 µA VEN/FBIN = 1.6V 13 17.5 22.5 µA VEN/FBIN = 0V 0 0.1 µA SS Charge Current VSS = 0V, Current Flows Out of SS Pin l 7 10.1 13.8 µA SS Low Detection Voltage Part Exiting Undervoltage Lockout l 18 50 82 mV SS Hi Detection Voltage SS Rising 1.5 1.8 2.1 V SS Falling 1.3 1.7 2.05 V SS Hi Detection Hysteresis 100 mV
Low Dropout Regulators, INTVCC and INTVEE
INTVCC Voltage IINTVCC = 10mA l 6.2 6.3 6.4 V INTVCC Undervoltage Lockout INTVCC Rising l 3.88 4 4.12 V INTVCC Falling l 3.5 3.73 3.95 V INTVCC Undervoltage Lockout Hysteresis 270 mV INTVCC Dropout Voltage VIN – INTVCC, VIN = 6V, VBIAS = 0V, IINTVCC = 10mA 255 mV VBIAS – VINTVCC, VIN = 0V, VBIAS = 6V, IINTVCC = 10mA 280 mV INTVCC Load Regulation VIN = 12V, VBIAS = 0V, IINTVCC = 0mA to 80mA –0.44 –2 % VIN = 0V, VBIAS = 12V, IINTVCC = 0mA to 40mA –0.34 –2 % INTVCC Line Regulation 10V ≤ VIN ≤ 80V, VBIAS = 0V, IINTVCC = 10mA –0.003 –0.03 %/V 10V ≤ VBIAS ≤ 80V, VIN = 0V, IINTVCC = 10mA –0.006 –0.03 %/V INTVCC Maximum External Load Current 5 mA INTVEE Voltage, VBIAS – VINTVEE IINTVEE = 10mA l 6.03 6.18 6.33 V INTVEE Undervoltage Lockout, VBIAS – VINTVEE Rising l 3.24 3.42 3.6 V VBIAS – VINTVEE VBIAS – VINTVEE Falling l 2.94 3.22 3.48 V INTVEE Undervoltage Lockout 200 mV Hysteresis, VBIAS – VINTVEE INTVEE Dropout Voltage, VINTVEE VBIAS = 6V, IINTVEE = 10mA 0.75 V
Control Loops (Refer to Block Diagram to Locate Amplifiers)
Current Limit Voltage, VCSP – VCSN VFBX = 1.1V, Minimum Duty Cycle l 46 50 54 mV VFBX = 1.1V, Maximum Duty Cycle l 23 31 38 mV VFBX = 1.4V, MODE = 0V, Minimum Duty Cycle l –23 –32 –41 mV VFBX = 1.4V, MODE = 0V, Maximum Duty Cycle l –38 –51 –65 mV FBX Positive Output Regulation Voltage, l 1.191 1.213 1.237 V EA1 FBX Negative Output Regulation Voltage, l –2 9.6 21 mV EA2 8710f For more information www.linear.com/LT8710 3
e lecTrical characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications for each channel are at TA = 25°C. VIN = 12V, VEN/FBIN = 12V, VBIAS = 12V, unless otherwise noted (Note 2). PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Operating Input Voltage VIN OR VBIAS l 4.25 4.5 V VIN if VBIAS ≥ 4.5V 0 V Quiescent Current, IVIN VBIAS = VISN = 7.5V, Not Switching 4 5.5 mA VBIAS = 6.3V, VINTVEE = VISN = 0V, Not Switching 5.5 7.5 mA Quiescent Current in Shutdown VEN/FBIN = 0V 0 1 µA EN/FBIN Active Mode EN/FBIN Rising l 1.64 1.7 1.76 V EN/FBIN Chip Enable EN/FBIN Rising l 1.22 1.3 1.38 V EN/FBIN Falling l 1.18 1.26 1.34 V EN/FBIN Chip Enable Hysteresis 44 mV EN/FBIN Input Voltage Low Shutdown Mode l 0.3 V EN/FBIN Pin Bias Current VEN/FBIN = 3V 44 60 µA VEN/FBIN = 1.7V 14 19.5 25 µA VEN/FBIN = 1.6V 13 17.5 22.5 µA VEN/FBIN = 0V 0 0.1 µA SS Charge Current VSS = 0V, Current Flows Out of SS Pin l 7 10.1 13.8 µA SS Low Detection Voltage Part Exiting Undervoltage Lockout l 18 50 82 mV SS Hi Detection Voltage SS Rising 1.5 1.8 2.1 V SS Falling 1.3 1.7 2.05 V SS Hi Detection Hysteresis 100 mV
Low Dropout Regulators, INTVCC and INTVEE
INTVCC Voltage IINTVCC = 10mA l 6.2 6.3 6.4 V INTVCC Undervoltage Lockout INTVCC Rising l 3.88 4 4.12 V INTVCC Falling l 3.5 3.73 3.95 V INTVCC Undervoltage Lockout Hysteresis 270 mV INTVCC Dropout Voltage VIN – INTVCC, VIN = 6V, VBIAS = 0V, IINTVCC = 10mA 255 mV VBIAS – VINTVCC, VIN = 0V, VBIAS = 6V, IINTVCC = 10mA 280 mV INTVCC Load Regulation VIN = 12V, VBIAS = 0V, IINTVCC = 0mA to 80mA –0.44 –2 % VIN = 0V, VBIAS = 12V, IINTVCC = 0mA to 40mA –0.34 –2 % INTVCC Line Regulation 10V ≤ VIN ≤ 80V, VBIAS = 0V, IINTVCC = 10mA –0.003 –0.03 %/V 10V ≤ VBIAS ≤ 80V, VIN = 0V, IINTVCC = 10mA –0.006 –0.03 %/V INTVCC Maximum External Load Current 5 mA INTVEE Voltage, VBIAS – VINTVEE IINTVEE = 10mA l 6.03 6.18 6.33 V INTVEE Undervoltage Lockout, VBIAS – VINTVEE Rising l 3.24 3.42 3.6 V VBIAS – VINTVEE VBIAS – VINTVEE Falling l 2.94 3.22 3.48 V INTVEE Undervoltage Lockout 200 mV Hysteresis, VBIAS – VINTVEE INTVEE Dropout Voltage, VINTVEE VBIAS = 6V, IINTVEE = 10mA 0.75 V
Control Loops (Refer to Block Diagram to Locate Amplifiers)
Current Limit Voltage, VCSP – VCSN VFBX = 1.1V, Minimum Duty Cycle l 46 50 54 mV VFBX = 1.1V, Maximum Duty Cycle l 23 31 38 mV VFBX = 1.4V, MODE = 0V, Minimum Duty Cycle l –23 –32 –41 mV VFBX = 1.4V, MODE = 0V, Maximum Duty Cycle l –38 –51 –65 mV FBX Positive Output Regulation Voltage, l 1.191 1.213 1.237 V EA1 FBX Negative Output Regulation Voltage, l –2 9.6 21 mV EA2 8710f For more information www.linear.com/LT8710 3