Datasheet LT8301 (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 = 5V, VEN/UVLO = VIN unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNIT
VIN Input Voltage Range l 2.7 42 V VIN UVLO Threshold Rising 2.5 2.65 V Falling 2.3 V IQ VIN Quiescent Current VEN/UVLO = 0.2V 0.8 2 µA VEN/UVLO = 1.1V 215 µA Sleep Mode (Switch Off) 100 µA Active Mode (Switch On) 350 µA EN/UVLO Shutdown Threshold For Lowest Off IQ l 0.2 0.55 V EN/UVLO Enable Threshold Falling 1.204 1.228 1.248 V Hysteresis 0.014 V IHYS EN/UVLO Hysteresis Current VEN/UVLO = 0.2V –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 fMIN Minimum Switching Frequency 9.4 10 10.6 kHz tON(MIN) Minimum Switch-On Time 170 ns tOFF(MAX) Maximum Switch-Off Time Backup Timer 190 µs ISW(MAX) Maximum SW Current Limit l 1.200 1.375 1.550 A ISW(MIN) Minimum SW Current Limit l 0.22 0.29 0.36 A RDS(ON) Switch On-Resistance ISW = 500mA 0.4 Ω ILKG Switch Leakage Current VIN = 42V, VSW = 65V 0.1 0.5 µA IRFB RFB Regulation Current l 97.5 100 102.5 µA RFB Regulation Current Line Regulation 2.7V ≤ VIN ≤ 42V 0.02 0.1 %/V
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings The LT8301I 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 LT8301J and LT8301H are guaranteed over the Maximum Rating condition for extended periods may affect device full –40°C to 150°C operating junction temperature range. The LT8301MP reliability and lifetime. is guaranteed over the full –55°C to 150°C operating junction temperature
Note 2:
The SW pin is rated to 65V for transients. Depending on the range. High junction temperatures degrade operating lifetimes. Operating leakage inductance voltage spike, operating waveforms of the SW pin lifetime is derated at junction temperature greater than 125°C. should be derated to keep the flyback voltage spike below 65V as shown
Note 4:
The LT8301 includes overtemperature protection that is intended in Figure 5. to protect the device during momentary overload conditions. Junction
Note 3:
The LT8301E 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. B 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 Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts