SLVSA86D March 2010 – October 2018 TPS54260
PRODUCTION DATA.
The following formulas show how to estimate the IC power dissipation under continuous conduction mode (CCM) operation. These equations should not be used if the device is working in discontinuous conduction mode (DCM).
The power dissipation of the IC includes conduction loss (Pcon), switching loss (PSW), gate drive loss (PGD) and supply current (Pq).
where
So
For given TA,
For given TJMAX = 150°C
where
There will be additional power losses in the regulator circuit due to the inductor ac and dc losses, the catch diode and trace resistance that will impact the overall efficiency of the regulator.