LMR61428XMM/NOPB datasheet by Texas Instruments

LMR61428XMM/NOPB Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal thermal performance?
  A 2-layer or 4-layer PCB with a solid ground plane and thermal vias is recommended. The device should be placed near a thermal pad or heat sink to dissipate heat efficiently.
• How do I ensure stability and prevent oscillations in the output voltage?
  To ensure stability, use a minimum output capacitance of 10uF, and ensure the output voltage is within the recommended range. Also, use a low-ESR capacitor and a 1uF ceramic capacitor in parallel to filter out high-frequency noise.
• What is the maximum input voltage that can be applied to the device?
  The maximum input voltage is 42V, but it's recommended to operate within the recommended input voltage range of 3.5V to 36V for optimal performance and reliability.
• How do I program the device for a specific output voltage?
  The output voltage can be programmed using the FB (feedback) pin and an external resistor divider network. The ratio of the resistors determines the output voltage, which can be calculated using the formula provided in the datasheet.
• What is the maximum output current that the device can deliver?
  The maximum output current is 4A, but it's recommended to operate within the recommended output current range of 0.5A to 3A for optimal performance and reliability.