TPS79933DDCT datasheet by Texas Instruments

TPS79933DDCT Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for the TPS79933DDCT to minimize noise and ensure stability?
  A good PCB layout for the TPS79933DDCT involves placing the input and output capacitors close to the device, using a solid ground plane, and keeping the power traces short and wide. Additionally, it's recommended to use a star-ground configuration and to avoid routing high-current traces near sensitive analog signals.
• How do I ensure the TPS79933DDCT is stable and doesn't oscillate?
  To ensure stability, make sure to follow the recommended PCB layout, use a sufficient output capacitor (at least 1uF), and add a small ceramic capacitor (around 10nF) between the VIN and EN pins. Additionally, ensure that the input voltage is within the recommended range and that the device is not overheating.
• What is the maximum input voltage that the TPS79933DDCT can handle?
  The TPS79933DDCT can handle input voltages up to 5.5V, but it's recommended to keep the input voltage below 5V to ensure reliable operation and to prevent overheating.
• Can I use the TPS79933DDCT in a high-temperature environment?
  The TPS79933DDCT is rated for operation up to 125°C, but its performance may degrade at high temperatures. It's recommended to use a heat sink or to implement thermal management techniques to keep the device temperature below 100°C for reliable operation.
• How do I calculate the output voltage of the TPS79933DDCT?
  The output voltage of the TPS79933DDCT is determined by the resistor divider network connected to the FB pin. The output voltage can be calculated using the formula: VOUT = 0.8V x (R1 + R2) / R2, where R1 and R2 are the resistors in the divider network.