ZHCSCL9A July 2014 – September 2021 TPS55340-EP
PRODUCTION DATA
In a SEPIC converter, the MOSFET must be rated to handle the sum of the input and output voltages. In this design with the maximum input voltage of 18 V and output voltage of 12 V, the FET will see approximately 30 V. TI recommends a 10% tolerance to account for any ringing. The 40-V rating of the TPS55340-EP power MOSFET comfortably satisfies this requirement.