MAX4890EETJ+ datasheet by Maxim Integrated Products

MAX4890EETJ+ Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for the MAX4890EETJ+ to minimize EMI?
  A good PCB layout for the MAX4890EETJ+ involves keeping the input and output traces separate, using a solid ground plane, and placing the device close to the power source. Additionally, using a shielded inductor and keeping the switching node (SW) away from sensitive nodes can help minimize EMI.
• How do I ensure the MAX4890EETJ+ operates within its safe operating area (SOA)?
  To ensure the MAX4890EETJ+ operates within its SOA, monitor the input voltage, output current, and junction temperature. Ensure the input voltage is within the recommended range, the output current is within the maximum rating, and the junction temperature is below the maximum rating of 150°C.
• What is the recommended input capacitor type and value for the MAX4890EETJ+?
  A low-ESR ceramic capacitor with a value of 10uF to 22uF is recommended for the input capacitor. This helps to filter out high-frequency noise and ensure stable operation.
• How do I optimize the inductor selection for the MAX4890EETJ+?
  To optimize the inductor selection, consider the inductor's saturation current, DC resistance, and core material. A shielded inductor with a saturation current rating above the maximum output current and a low DC resistance is recommended.
• What is the recommended output capacitor type and value for the MAX4890EETJ+?
  A low-ESR ceramic capacitor with a value of 10uF to 22uF is recommended for the output capacitor. This helps to filter out high-frequency noise and ensure stable operation.