Datasheet LT8714 (Analog Devices) - 3

LT8714
ELECTRICAL 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 = 12V, VBIAS = 12V, unless otherwise noted (Note 2). PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Operating Input Voltage l 4.25 4.5 V Quiescent Current, IVIN Not Switching, VBIAS = 7.5V 4 5.5 mA Quiescent Current in Shutdown VEN = 0V 0 1 μA EN Chip Enable Thresholds EN Rising l 1.22 1.3 1.38 V EN Falling l 1.18 1.26 1.34 V EN Chip Enable Hysteresis 44 mV EN Input Voltage Low Shutdown Mode l 0.3 V EN Pin Bias Current VEN = 3V 44 60 μA VEN = 1.3V 12.7 15.2 μA VEN = 0V 0 0.1 μA SS Charge Current VSS = 50mV, Current Flowing 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 Voltage to Enable Switching SS Rising 0.75 1.0 1.21 V SS Falling 0.65 0.92 1.15 V SS Hysteresis 80 mV
Low Dropout Regulators, IINTVCC and IINTVEE
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 = 6V, IINTVCC = 10mA 255 mV INTVCC Load Regulation VIN = 12V, IINTVCC = 0mA to 80mA –0.44 –2 % INTVCC Line Regulation 10V ≤ VIN ≤ 80V, IINTVCC = 10mA –0.005 –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 Hysteresis, 200 mV VBIAS – VINTVEE IINTVEE Dropout Voltage, VINTVEE VBIAS = 6V, IINTVEE = 10mA 0.75 V
Control Loops (Refer to Block Diagram to Locate Amplifiers)
Current Limit Voltage, VCSP – VCSN VFB = 1.4V, CTRL = 1.1V, Minimum Duty Cycle l 60.5 66 71.5 mV VFB = 1.4V, CTRL = 1.1V, Maximum Duty Cycle l 40 47 56 mV VFB = 0.1V, CTRL = 1.1V, Minimum Duty Cycle l –23 –32 –41 mV VFB = 0.1V, CTRL = 1.1V, Maximum Duty Cycle l –38 –51 –65 mV FB Regulation Voltage CTRL = 1.1V l 1.092 1.102 1.112 V CTRL = 0.1V l 0.092 0.102 0.112 V CTRL = 0V l 0 0.0167 0.033 V FB Pin Bias Current at FB Regulation. (Note 6) CTRL = 1.1V l 66.4 68.3 70.2 µA CTRL = 0.1V l –67.7 –69.7 –71.7 µA CTRL = 0V l –77.6 –81.6 –85 µA 8714f For more information www.linear.com/LT8714 3 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Appendix Typical Applications Package Description Typical Application Related Parts