LM26480QSQ-AA/NOPB datasheet by Texas Instruments

LM26480QSQ-AA/NOPB Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal thermal performance?
  A good PCB layout for the LM26480QSQ-AA/NOPB should include a solid ground plane, wide power traces, and a thermal relief pattern under the device to facilitate heat dissipation. TI provides a recommended PCB layout in the datasheet and application notes.
• How do I ensure stability and prevent oscillations in the output voltage?
  To ensure stability, it's essential to follow the recommended component values and PCB layout guidelines. Additionally, a minimum ESR (Equivalent Series Resistance) of 10mΩ for the output capacitor is recommended. TI also provides a stability analysis tool to help with component selection.
• What is the maximum input voltage that can be applied to the device?
  Although the datasheet specifies a maximum input voltage of 42V, it's recommended to derate the input voltage to 40V to ensure reliable operation and prevent damage to the device.
• How do I select the right inductor value for my application?
  The inductor value depends on the output voltage, output current, and switching frequency. TI provides an inductor selection guide in the datasheet and application notes. A general rule of thumb is to choose an inductor with a value between 1.5μH and 3.3μH for most applications.
• What is the recommended input capacitor type and value for this device?
  A low-ESR ceramic capacitor (X5R or X7R dielectric) with a value between 4.7μF and 10μF is recommended for the input capacitor. This helps to filter out high-frequency noise and ensure stable operation.