Datasheet LT8390A (Analog Devices) - 4

LT8390A
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 l 97 100 103 mV VCTRL = 2V, VISP = 0V l 97 100 103 mV 1/10th Current Regulation V(ISP-ISN) VCTRL = 0.35V, VISP = 12V l 8 10 12 mV VCTRL = 0.35V, VISP = 0V l 8 10 12 mV ISMON Monitor Output VISMON V(ISP-ISN) = 100mV, VISP = 12V/0V l 1.20 1.25 1.30 V V(ISP-ISN) = 10mV, VISP = 12V/0V l 0.30 0.35 0.40 V V(ISP-ISN) = 0mV, VISP = 12V/0V l 0.20 0.25 0.30 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 23 µA VLOADEN = 5V, VISP = VISN = 0V –10 µA VEN/UVLO = 0V, VISP = VISN = 12V or 0V 0 µA ISN Input Bias Current VLOADEN = 5V, VISP = VISN = 12V 23 µA VLOADEN = 5V, VISP = VISN = 0V –10 µA VEN/UVLO = 0V, VISP = VISN = 12V or 0V 0 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 l 35 50 65 mV Boost, VFB = 0.8V l 40 50 60 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 12.5 15 µA SS Pull-Down Current VFB = 0.1V, VSS = 2V 1 1.25 1.5 µA SS Fault Latch-Off Threshold 1.7 V SS Fault Reset Threshold 0.2 V 8390afa 4 For more information www.linear.com/LT8390A Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts