TPS78633DCQ datasheet by Texas Instruments

TPS78633DCQ Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for the TPS78633DCQ to minimize noise and ensure stability?
  A good PCB layout for the TPS78633DCQ involves placing the input and output capacitors close to the device, using a solid ground plane, and keeping the input and output traces separate to minimize noise coupling. TI provides a recommended PCB layout in the datasheet and application notes.
• How do I ensure the TPS78633DCQ is stable and doesn't oscillate?
  To ensure stability, make sure to follow the recommended PCB layout, use a sufficient output capacitor (at least 10uF), and add a small ceramic capacitor (around 10nF) between the output and ground. Additionally, ensure the input voltage is within the recommended range and the device is not overheating.
• What is the maximum input voltage that the TPS78633DCQ can handle?
  The TPS78633DCQ can handle input voltages up to 15V, but it's recommended to keep the input voltage below 12V for optimal performance and to prevent overheating.
• Can I use the TPS78633DCQ in a high-temperature environment?
  The TPS78633DCQ is rated for operation up to 125°C, but its performance may degrade at high temperatures. Ensure proper heat sinking and thermal management to prevent overheating, and consider using a heat sink or thermal pad if operating in high-temperature environments.
• How do I calculate the output voltage of the TPS78633DCQ?
  The output voltage of the TPS78633DCQ is determined by the resistor divider network (R1 and R2) connected to the FB pin. Use the formula: Vout = 0.8V x (1 + R2/R1) to calculate the output voltage.