Datasheet LT8300 (Analog Devices) - 3

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ELECTRICAL CHARACTERISTICS 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 5.8 6 V Falling 3.2 V IQ VIN Quiescent Current VEN/UVLO = 0.3V 1.2 2 µA VEN/UVLO = 1.1V 200 µA Sleep Mode (Switch Off) 70 µA Active Mode (Switch On) 330 µA EN/UVLO Shutdown Threshold For Lowest Off IQ l 0.3 0.75 V EN/UVLO Enable Threshold Falling l 1.199 1.223 1.270 V Hysteresis 0.016 V IHYS EN/UVLO Hysteresis Current VEN/UVLO = 0.3V –0.1 0 0.1 µA VEN/UVLO = 1.1V 2.2 2.5 2.8 µA VEN/UVLO = 1.3V –0.1 0 0.1 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
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings The LT8300I is guaranteed over the full –40°C to 125°C operating junction may cause permanent damage to the device. Exposure to any Absolute temperature range. The LT8300H is guaranteed over the full –40°C to Maximum Rating condition for extended periods may affect device 150°C operating junction temperature range. The LT8300MP is guaranteed reliability and lifetime. over the full –55°C to 150°C operating junction temperature range. High
Note 2:
The SW pin is rated to 150V for transients. Depending on the junction temperatures degrade operating lifetimes. Operating lifetime is leakage inductance voltage spike, operating waveforms of the SW pin derated at junction temperature greater than 125°C. should be derated to keep the flyback voltage spike below 150V as shown
Note 4:
The LT8300 includes overtemperature protection that is intended in Figure 5. to protect the device during momentary overload conditions. Junction
Note 3:
The LT8300E is guaranteed to meet performance specifications temperature will exceed 150°C when overtemperature protection is active. from 0°C to 125°C operating junction temperature. Specifications over Continuous operation above the specified maximum operating junction the –40°C to 125°C operating junction temperature range are assured by temperature may impair device reliability. design, characterization and correlation with statistical process controls. Rev. A For more information www.analog.com 3 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Operation Applications Information Typical Applications Package Description Typical Application Related Parts