JAJSI75A April 2018 – November 2019 TPS57112C-Q1
PRODUCTION DATA.
The following formulas show how to estimate the IC power dissipation under continuous-conduction-mode (CCM) operation. The power dissipation of the IC (PT) includes conduction loss (P(con)), dead-time loss (P(d)), switching loss (P(SW)), gate-drive loss (P(gd)), and supply-current loss (P(q)).
where
where
where
Therefore:
where
For a given TA:
where
For a given TJ(max):
where
Additional power losses occur in the regulator circuit because of the inductor ac and dc losses and trace resistance that impact the overall efficiency of the regulator.