MAX9928FABT+TG45 datasheet by Maxim Integrated Products

MAX9928FABT+TG45 Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for the MAX9928FABT+TG45 to ensure optimal performance?
  A good PCB layout is crucial for the MAX9928FABT+TG45. Ensure that the input and output traces are separated, and the device is placed close to the battery. Use a solid ground plane and avoid vias under the device. Keep the input capacitors close to the device and use a low-ESR capacitor for the output filter.
• How do I select the correct input and output capacitors for the MAX9928FABT+TG45?
  Choose input capacitors with a low ESR (Equivalent Series Resistance) and a high ripple current rating. For the output filter, use a capacitor with a low ESR and a high capacitance value (e.g., 10uF to 22uF). The output capacitor should be able to handle the output current and voltage ripple.
• What is the maximum input voltage that the MAX9928FABT+TG45 can handle?
  The MAX9928FABT+TG45 can handle input voltages up to 18V, but it's recommended to keep the input voltage below 16V to ensure reliable operation and prevent damage to the device.
• How do I configure the MAX9928FABT+TG45 for a specific output voltage?
  The output voltage of the MAX9928FABT+TG45 can be adjusted by connecting a resistor divider network between the output and the FB (Feedback) pin. The resistor values can be calculated using the formula provided in the datasheet or by using an online calculator.
• What is the typical efficiency of the MAX9928FABT+TG45?
  The typical efficiency of the MAX9928FABT+TG45 is around 90% to 95% depending on the input voltage, output voltage, and load current. The efficiency can be improved by optimizing the PCB layout, using low-ESR capacitors, and selecting the correct output inductor.