L4938EPD datasheet by STMicroelectronics

L4938EPD Frequently Asked Questions (FAQs)

• What is the maximum input voltage that can be applied to the L4938EPD?
  The maximum input voltage that can be applied to the L4938EPD is 30V, but it's recommended to keep it below 28V for reliable operation.
• How do I ensure the L4938EPD is stable and doesn't oscillate?
  To ensure stability, make sure to follow the recommended PCB layout guidelines, use a sufficient output capacitor (at least 10uF), and keep the input voltage ripple below 1V.
• What is the minimum load current required for the L4938EPD to operate correctly?
  The L4938EPD can operate with a minimum load current of 1mA, but it's recommended to have a load current of at least 10mA for stable operation.
• Can I use the L4938EPD in a high-temperature environment?
  The L4938EPD is rated for operation up to 150°C, but its performance may degrade above 125°C. It's recommended to derate the output current and voltage according to the temperature derating curve in the datasheet.
• How do I protect the L4938EPD from input voltage surges and spikes?
  Use a TVS diode or a transient voltage suppressor in parallel with the input capacitor to protect the L4938EPD from input voltage surges and spikes.