MAX398CSE+ datasheet by Maxim Integrated Products

MAX398CSE+ Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for the MAX398CSE+?
  The recommended PCB layout for the MAX398CSE+ is to keep the input and output traces as short as possible, and to use a solid ground plane to minimize noise and EMI. Additionally, it's recommended to place a 10uF capacitor between the VIN and GND pins to filter out high-frequency noise.
• How do I ensure the MAX398CSE+ is stable and doesn't oscillate?
  To ensure stability, make sure to follow the recommended component values and PCB layout guidelines. Additionally, ensure that the input voltage is within the recommended range, and that the output capacitor is of sufficient value (at least 10uF) and has a low ESR. Also, avoid using long input and output traces, and keep the device away from high-current switching nodes.
• What is the maximum input voltage that the MAX398CSE+ can handle?
  The MAX398CSE+ can handle input voltages up to 5.5V, but it's recommended to keep the input voltage within the range of 2.7V to 5.5V for optimal performance and reliability.
• Can I use the MAX398CSE+ in a high-temperature environment?
  The MAX398CSE+ is rated for operation up to 125°C, but it's recommended to derate the output current and input voltage as the temperature increases to ensure reliability and prevent thermal shutdown.
• How do I calculate the output voltage of the MAX398CSE+?
  The output voltage of the MAX398CSE+ is determined by the resistive divider network connected to the FB pin. The output voltage can be calculated using the formula: VOUT = 0.8V x (1 + R1/R2), where R1 and R2 are the resistors in the divider network.