JAJS453E November 2007 – April 2019 TPS61165
PRODUCTION DATA.
The maximum device junction temperature must be restricted to 125°C under normal operating conditions. This restriction limits the power dissipation of the TPS61165. Calculate the maximum allowable dissipation, PD(max), and keep the actual dissipation less than or equal to PD(max). The maximum-power-dissipation limit is determined using Equation 8:
where
The TPS61165 comes in a thermally enhanced QFN package. This package includes a thermal pad that improves the thermal capabilities of the package. The RθJA of the QFN package greatly depends on the PCB layout and thermal pad connection. The thermal pad must be soldered to the analog ground on the PCB. Using thermal vias underneath the thermal pad as illustrated in the layout example. Also see the QFN/SON PCB Attachment application report (SLUA271).