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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LT8331 датащи(PDF) 4 Page - Analog Devices |
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LT8331 датащи(HTML) 4 Page - Analog Devices |
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4 / 24 page  LT8337/LT8337-1 4 Rev. 0 For more information www.analog.com ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 5V, EN/UVLO = 2V, unless otherwise noted. Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: The LT8337EV/LT8337EV-1 are guaranteed to meet performance specifications from the 0°C to 125°C junction temperature. Specifications over the –40°C to 125°C operating junction temperature range are assured by design, characterization and correlation with statistical process controls. The LT8337JV/LT8337JV-1 are guaranteed to meet performance specifications over the –40°C to 150°C operating junction temperature ranges. High junction temperatures degrade operating lifetimes; operating lifetime is de-rated for junction temperatures greater than 125°C. Note 3: These ICs include overtemperature protection that is intended to protect the device during momentary overload conditions. The maximum rated junction temperature will be exceeded when this protection is active. Continuous operation above the specified absolute maximum operating junction temperature may impair device reliability or permanently damage the device. Note 4: θ values are determined by simulation per JESD51 conditions. PARAMETER CONDITIONS MIN TYP MAX UNITS Bottom Switch On-Resistance ISW = 1A 32 mΩ Bottom Switch Current Limit l 5 6 6.6 A Bottom Switch Minimum Off-time 20 50 ns Bottom Switch Minimum On-time VIN = 9.5V, VOUT = 10V 20 80 ns Top Switch On-Resistance ISW = 1A 35 mΩ SW Leakage Current VOUT = 28V, SW = 0V, 28V –1.5 1.5 μA VOUT Pin Current SYNC/MODE = 0V, VOUT = 10V, Not Switching 1 μA VIN = 10.1V, VOUT = 10V , FB = 1.05V (In PassThru Mode) 30 μA PassThru Mode VIN to VOUT Threshold (VIN – VOUT) VIN Rising VIN Falling 0 –0.6 V V PassThru Mode Top Switch Reverse Current Limit VIN = 9.9V, VOUT = 10V, FB = 1.05V (Top Switch Turns Off) 1.5 A Efficiency and Power Loss vs Output Current Efficiency and Power Loss vs Output Current Burst Mode Efficiency vs Inductor Value INDUCTOR VALUE (H) 1 2 3 4 5 65 70 75 80 85 90 95 100 83371 G03 FRONT PAGE CIRCUIT ILOAD = 10mA 1.0 H: COILCRAFT XGL4020-102ME 1.5 H: COILCRAFT XGL4020-152ME 2.2 H: COILCRAFT XEL5030-222ME 4.7H: COILCRAFT XAL5030-472ME VIN = 13V VIN = 5V OUTPUT CURRENT (mA) 0.1 1 10 100 1000 10000 0 10 20 30 40 50 60 70 80 90 100 0.1 1 10 100 1000 10000 83371 G01 VIN = 13V VIN = 5V FRONT PAGE CIRCUIT FRONT PAGE CIRCUIT VIN = 7.2V OUTPUT CURRENT (mA) 1 10 100 1000 0 10 20 30 40 50 60 70 80 90 100 0.1 1 10 100 1000 10000 83371 G02 BURST EFFICIENCY BURST LOSS PULSE-SKIPPING EFFICIENCY PULSE-SKIPPING LOSS TYPICAL PERFORMANCE CHARACTERISTICS T A ≈ TJ = 25°C, unless otherwise noted. |
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