link to page 10 link to page 10 IR 888 OptiMOS™ IPOL25 A single-voltage synchronous Buck regulatorThermal Characteristics6Thermal Characteristics6.1Thermal CharacteristicsDescriptionSymbolValuesTest Conditions Junction to Ambient Thermal Resistance θJA 17 °C/W Note 2 Junction to PCB Thermal Resistance θJC-PCB 3.5 °C/W Note 3 Junction to Case Top Thermal Resistance θJC 15 °C/W Note: 2. Thermal resistance is measured with components mounted on a standard EVAL_3888_1Vout demo board in free air. 3. Thermal resistance is based on the board temperature near the PVin pin. Final Datasheet 10 of 49 V2.1 2019-12-11 Document Outline Revision History Trademarks Disclaimer