TPS54040DGQR datasheet by Texas Instruments

TPS54040DGQR Frequently Asked Questions (FAQs)

• What is the maximum input voltage that can be applied to the TPS54040DGQR?
  The maximum input voltage that can be applied to the TPS54040DGQR is 42V, but it's recommended to keep it below 40V for reliable operation.
• How do I ensure the stability of the output voltage?
  To ensure the stability of the output voltage, it's essential to use a suitable output capacitor with a low equivalent series resistance (ESR) and a sufficient capacitance value. A 10uF to 22uF ceramic capacitor is recommended.
• What is the minimum input capacitance required for the TPS54040DGQR?
  The minimum input capacitance required for the TPS54040DGQR is 1uF, but it's recommended to use a 4.7uF to 10uF ceramic capacitor to ensure stable operation.
• Can I use the TPS54040DGQR in a high-temperature environment?
  The TPS54040DGQR is rated for operation up to 125°C, but it's essential to consider the thermal design and ensure that the junction temperature (TJ) does not exceed 150°C.
• How do I calculate the output voltage of the TPS54040DGQR?
  The output voltage of the TPS54040DGQR can be calculated using the formula: Vout = 0.8V x (1 + R2/R1), where R1 and R2 are the resistors used in the feedback network.