- Hello, We are doing the thermal analysis of i.MX6UL board by using MC34PF3000A7EP chip. For this we need efficiencies of linear and switching regulators available in PMIC. However we found that detailed efficiencies for the switcher and LDO's are not given in to their respective electrical characteristics section (attached the datasheet of PMIC). We want it for the calculation of overall power dissipation of the PMIC. Do let us know how to move ahead with this or you have a excel sheet wherein these thermal calculation are already done.