LT8645S-2 ELECTRICAL CHARACTERISTICSThe l denotes the specifications which apply over the full operatingtemperature range, otherwise specifications are at TA = 25°C. Note 1: Stresses beyond those listed under Absolute Maximum Ratings Note 3: θ values determined per JEDEC 51-7, 51-12. See Applications may cause permanent damage to the device. Exposure to any Absolute Information Section for information on improving the thermal resistance Maximum Rating condition for extended periods may affect device and for actual temperature measurements of a demo board in typical reliability and lifetime. operating conditions. Note 2: The LT8645S-2E is guaranteed to meet performance specifications Note 4: This IC includes overtemperature protection that is intended to from 0°C to 125°C junction temperature. Specifications over the –40°C protect the device during overload conditions. Junction temperature will to 125°C operating junction temperature range are assured by design, exceed 150°C when overtemperature protection is active. Continuous characterization, and correlation with statistical process controls. The operation above the specified maximum operating junction temperature LT8645S-2J and LT8645-2H are guaranteed over the full –40°C to 150°C will reduce lifetime. operating junction temperature range. High junction temperatures degrade operating lifetimes. Operating lifetime is derated at junction temperatures greater than 125°C. The junction temperature (TJ, in °C) is calculated from the ambient temperature (TA in °C) and power dissipation (PD, in Watts) according to the formula: TJ = TA + (PD • θJA) where θJA (in °C/W) is the package thermal impedance. Rev 0 4 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Typical Applications Related Parts
