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LT3757 Datasheet(PDF) 3 Page - Analog Devices |
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LT3757 Datasheet(HTML) 3 Page - Analog Devices |
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3 / 24 page  LT8300 3 Rev. A For more information www.analog.com ELECTRICAL CHARACTERISTICS 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 SW pin is rated to 150V for transients. Depending on the leakage inductance voltage spike, operating waveforms of the SW pin should be derated to keep the flyback voltage spike below 150V as shown in Figure 5. Note 3: The LT8300E is guaranteed to meet performance specifications from 0°C to 125°C operating 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 l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 24V, VEN/UVLO = VIN unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNIT VIN Input Voltage Range 6 100 V VIN UVLO Threshold Rising Falling 5.8 3.2 6 V V IQ VIN Quiescent Current VEN/UVLO = 0.3V VEN/UVLO = 1.1V Sleep Mode (Switch Off) Active Mode (Switch On) 1.2 200 70 330 2 µA µA µA µA EN/UVLO Shutdown Threshold For Lowest Off IQ l 0.3 0.75 V EN/UVLO Enable Threshold Falling Hysteresis l 1.199 1.223 0.016 1.270 V V IHYS EN/UVLO Hysteresis Current VEN/UVLO = 0.3V VEN/UVLO = 1.1V VEN/UVLO = 1.3V –0.1 2.2 –0.1 0 2.5 0 0.1 2.8 0.1 µA µA µA fMAX Maximum Switching Frequency 720 750 780 kHz fMIN Minimum Switching Frequency 6 7.5 9 kHz tON(MIN) Minimum Switch-On Time 160 ns tOFF(MIN) Minimum Switch-Off Time 350 ns tOFF(MAX) Maximum Switch-Off Time Backup Timer 200 µs ISW(MAX) Maximum SW Current Limit l 228 260 292 mA ISW(MIN) Minimum SW Current Limit l 34 52 70 mA SW Over Current Limit To Initiate Soft-Start 520 mA RDS(ON) Switch On-Resistance ISW = 100mA 10 Ω ILKG Switch Leakage Current VIN = 100V, VSW = 150V 0.1 0.5 µA IRFB RFB Regulation Current l 98 100 102 µA RFB Regulation Current Line Regulation 6V ≤ VIN ≤ 100V 0.001 0.01 %/V tSS Soft-Start Timer 2.7 ms The LT8300I is guaranteed over the full –40°C to 125°C operating junction temperature range. The LT8300H is guaranteed over the full –40°C to 150°C operating junction temperature range. The LT8300MP is guaranteed over the full –55°C to 150°C operating junction temperature range. High junction temperatures degrade operating lifetimes. Operating lifetime is derated at junction temperature greater than 125°C. Note 4: The LT8300 includes overtemperature protection that is intended to protect the device during momentary overload conditions. Junction temperature will exceed 150°C when overtemperature protection is active. Continuous operation above the specified maximum operating junction temperature may impair device reliability. |
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