Datasheet LT8697 (Analog Devices) - 3

LT8697
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Notes 2, 4) PARAMETER CONDITIONS MIN TYP MAX UNIT
USB5V Current VISN = 5V, VISP – VISN = 40mV, RCBL = 13.7k l 57.5 60 62.5 µA   VISN = 5V, VISP – VISN = 10mV, RCBL = 13.7k l 12 15 23 µA VISN = 5V, VISP – VISN = 0V, RCBL = 13.7k l 0 2 8 µA RCBL = Open l 0 1 2 µA Current Sense Voltage (VISP – VISN) VCTRL = 1.5V, VISN = 5V l 45 48 51 mV VCTRL = 1.5V, VISN = 0V l 43 48.5 54 mV VCTRL = 800mV, VISN = 5V l 34.5 39.5 44.5 mV VCTRL = 800mV, VISN = 0V l 34 40 46 mV VCTRL = 200mV, VISN = 5V l 4.5 9.5 14.5 mV VCTRL = 200mV, VISN = 0V l 3.5 10 16.5 mV RCBL Monitor Voltage VISP – VISN = 40mV, RCBL = 13.7k l 720 800 880 mV VISP – VISN = 10mV, RCBL = 13.7k l 115 205 305 mV RCBL Output Current Limit VISP – VISN = 50mV, VRCBL = 0V –2 –3 –4 mA ISP, ISN Bias Current VISP = VISN = 0V, 5V –20 20 µA ICTRL Current VICTRL = 1.5V –0.5 –2 –3 µA INTVCC Voltage VSYS = 0V, 5V 3.4 V INTVCC Undervoltage Lockout 2.6 2.9 3.15 V SYS Voltage in SYS Regulation VIN = 12V l 5.63 5.8 5.92 V SYS Voltage to Disable Forced Continuous Mode 7.5 V SYS Current in Regulation VSYS = 5V, RT = 56.2k l 3 4 5 mA Dropout Voltage (VIN – VSYS) VSYS = 5V, ILOAD = 2.1A 450 mV Maximum Duty Cycle in Dropout 96 97.5 99 % Minimum On-Time ILOAD = 1A l 30 45 70 ns Minimum Off-Time ILOAD = 0.5A 80 110 ns Minimum VIN for SYS Regulation at Full Frequency RT = 16.5k, VUSB5V = 0V, ILOAD = 0.5A 6.2 7 7.9 V Oscillator Frequency RT = 140k l 250 300 340 kHz RT = 56.2k l 620 700 750 kHz RT = 16.5k l 1.85 2.00 2.05 MHz Top Power NMOS On-Resistance ISW = 1A 120 mΩ Top Power NMOS Current Limit E-, I-Grades l 3.2 4.8 6 A H-Grade l 2.9 4.8 6 A Bottom Power NMOS On-Resistance VINTVCC = 3.4V, ISW = 1A 65 mΩ Bottom Power NMOS Current Limit VINTVCC = 3.4V 3.5 4.5 5.8 A SW Leakage Current VIN = 42V, VSW = 0V, 42V 0.1 5 µA EN/UV Threshold VEN/UV Rising l 0.94 1.0 1.06 V EN/UV Hysteresis 40 mV EN/UV Bias Current VEN/UV = 2V –20  20 nA PG Upper Threshold Offset from VUSB5V VUSB5V Falling l 6 9 12 % PG Lower Threshold Offset from VUSB5V VUSB5V Rising l –6 –9 –12 % PG Hysteresis 1.3 % PG Pull-Down Resistance VPG = 0.1V l 680 2000 Ω PG Transition Delay VUSB5V from 5V to 4V 40 µs SYNC Threshold VSYNC Falling 0.8 1.1 1.4 V VSYNC Rising 1.6 2.0 2.4 V SYNC Pin Current VSYNC = 2V –1 1 µA TR/SS Current VTR/SS = 0V –1.2 –2.2 –3.2 µA TR/SS Pull-Down Resistance Fault Condition, VTR/SS = 0.1V 230 Ω 8697fb For more information www.linear.com/LT8697 3 Document Outline Features Applications Typical Application Absolute Maximum Ratings Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts