link to page 2 LT8650S ELECTRICAL CHARACTERISTICS Note 1: Stresses beyond those listed under Absolute Maximum Ratings operating junction temperature range. Operating lifetime is derated at may cause permanent damage to the device. Exposure to any Absolute junction temperatures greater than 125°C. The junction temperature (TJ, Maximum Rating condition for extended periods may affect device in °C) is calculated from the ambient temperature (TA in °C) and power reliability and lifetime. dissipation (PD, in Watts) according to the formula: Note 2: The LT8650SE is guaranteed to meet performance specifications TJ = TA + (PD • θJA) where θJA (in °C/W) is the package thermal from 0°C to 125°C junction temperature. Specifications over the –40°C impedance. to 125°C operating junction temperature range are assured by design, Note 3: This IC includes overtemperature protection that is intended to characterization, and correlation with statistical process controls. The protect the device during overload conditions. Junction temperature will LT8650SI is guaranteed over the full –40°C to 125°C operating junction exceed 150°C when overtemperature protection is active. Continuous temperature range. High junction temperatures degrade operating operation above the specified maximum operating junction temperature lifetimes. The LT8650SJ is guaranteed over the full –40°C to 150°C will reduce lifetime TYPICAL PERFORMANCE CHARACTERISTICS5VOUT Efficiency5VOUT Efficiency 100 6.0 100 fSW = 2MHz EFFICIENCY f 95 SW = 2MHz FCM 5.5 90 90 5.0 80 85 4.5 POWER LOSS (W) BURST 70 80 4.0 75 3.5 60 70 12V 3.0 50 24V 65 FCM 36V 2.5 40 EFFICIENCY (%) 60 2.0 EFFICIENCY (%) 12V 30 55 1.5 24V POWER LOSS 20 50 1.0 36V 45 10 L = XFL5030, 1.0µH 0.5 L = XFL5030, 1.0µH 40 0 0 0 1 2 3 4 5 6 0.1 1 10 100 1k 10k LOAD CURRENT (A) LOAD CURRENT (mA) 8650S G01 8650S G02 3.3VOUT Efficiency3.3VOUT Efficiency 100 6.0 100 fSW = 2MHz f 95 EFFICIENCY SW = 2MHz 5.5 FCM 90 90 5.0 80 85 4.5 BURST POWER LOSS (W) 70 80 4.0 60 75 3.5 12V 70 3.0 50 24V FCM 65 36V 2.5 40 EFFICIENCY (%) 2.0 EFFICIENCY (%) 60 12V 30 55 1.5 24V 20 36V POWER LOSS 50 1.0 10 45 0.5 L = XFL5030, 1.0µH L = XFL5030, 1.0µH 40 0 0 0 1 2 3 4 5 6 0.1 1 10 100 1k 10k LOAD CURRENT (A) LOAD CURRENT (mA) 8650S G03 8650S G04 Rev. B 4 For more information www.analog.com 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
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