LMH0031VS datasheet by Texas Instruments

LMH0031VS Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal performance of the LMH0031VS?
  Texas Instruments recommends a 4-layer PCB with a solid ground plane on the bottom layer, and a power plane on the internal layer. The input and output traces should be kept short and away from the switching node to minimize EMI.
• How do I ensure the LMH0031VS is stable and doesn't oscillate?
  To ensure stability, make sure to follow the recommended component values and layout guidelines in the datasheet. Additionally, add a 10nF to 22nF capacitor in parallel with the feedback resistor to improve phase margin.
• What is the maximum input voltage that can be applied to the LMH0031VS?
  Although the datasheet specifies a maximum input voltage of 12V, it's recommended to limit the input voltage to 10V to ensure reliable operation and prevent damage to the device.
• Can I use the LMH0031VS in a high-temperature environment?
  The LMH0031VS is rated for operation up to 85°C, but it's recommended to derate the output current and voltage at higher temperatures to ensure reliable operation. Consult the datasheet for thermal derating guidelines.
• How do I troubleshoot issues with the LMH0031VS, such as output voltage droop or instability?
  Use an oscilloscope to monitor the input and output voltages, as well as the switching node. Check for signs of oscillation, ringing, or excessive noise. Verify that the input voltage is within the recommended range and that the output capacitor is properly sized.