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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LTC3370 датащи(PDF) 3 Page - Analog Devices |
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LTC3370 датащи(HTML) 3 Page - Analog Devices |
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3 / 26 page  LTC3307A 3 Rev. A For more information www.analog.com ELECTRICAL CHARACTERISTICS PARAMETER CONDITIONS MIN TYP MAX UNITS Input Supply Operating Supply Voltage (VIN) l 2.25 5.5 V VIN Undervoltage Lockout VIN Undervoltage Lockout Hysteresis VIN Rising l 2.0 2.1 150 2.2 V mV VIN Quiescent Current in Shutdown VEN = 0.1V 1 2 µA VIN Quiescent Current (Note 3) Burst Mode Operation, Sleeping All Modes, Not Sleeping 40 1.2 60 2 µA mA Enable Threshold Enable Threshold Hysteresis VEN Rising l 0.375 0.4 50 0.425 V mV EN Pin Leakage VEN =0.5V ±20 nA Voltage Regulation Regulated Feedback Voltage (VFB) l 0.495 0.5 0.505 V Feedback Voltage Line Regulation VIN = 2.25V to 5.5V 0.015 0.05 %/V FB Pin Input Current VFB = 0.5V ±20 nA Minimum On Time (tON,min) VIN = 5.5V l 22 42 ns Maximum Duty Cycle l 100 % Top Switch ON-Resistance 31 mΩ Bottom Switch ON-Resistance 8 mΩ Top Switch Current Limit (IPEAKMAX) VOUT/VIN ≤ 0.2 4.5 4.8 5.1 A Bottom Switch Current Limit (IVALLEYMAX) 3.9 A Bottom Switch Reverse Current Limit (IREVMAX) Forced Continuous Mode –0.75 –1.5 –2.25 A SW Leakage Current VEN = 0.1V ±100 nA Power Good and Soft-Start PGOOD Rising Threshold PGOOD Hysteresis As a Percentage of the Regulated VOUT l l 97 0.7 98 1.2 99 1.7 % % Overvoltage Rising Threshold Overvoltage Hysteresis As a Percentage of the Regulated VOUT l l 107 1 110 2.2 114 3.5 % % PGOOD Delay 120 µs PGOOD Pull Down Resistance VPGOOD = 0.1V 10 20 Ω PGOOD Leakage Current VPGOOD = 5.5V 20 nA Soft-Start Duration VOUT rising from 0V to PGOOD Threshold l 0.25 1 3 ms Oscillator and MODE/SYNC Default Oscillator Frequency l 1.9 2 2.1 MHz Oscillator Frequency with RT = 34.8kΩ l 1.9 2 2.1 MHz Frequency Range RT Programming and Synchronization l 1 3 MHz Minimum SYNC High or Low Pulse Width l 40 ns SYNC Pulse Voltage Levels Level High Level Low l l 1.2 0.4 V V MODE/SYNC No Clock Detect Time 10 µs MODE/SYNC Pin Threshold For Programming Pulse Skip Mode For Programming Forced Continuous Mode For Programming Burst Mode Operation l l l 1.0 VIN – 0.1 Float 0.1 VIN – 1.0 V V V The l denotes the specifications which apply over the specified operating junction temperature range (Note 2), otherwise specifications are at TA = 25°C; VIN = 3.3V, VEN = VIN, MODE/SYNC = Float, unless otherwise noted. |
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