LM5143QRWGRQ1 datasheet by Texas Instruments

LM5143QRWGRQ1 Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for the LM5143QRWGRQ1 to minimize EMI?
  A good PCB layout for the LM5143QRWGRQ1 involves keeping the input and output capacitors close to the IC, using a solid ground plane, and minimizing the length of the high-current paths. TI provides a recommended layout in the datasheet and application notes.
• How do I ensure the LM5143QRWGRQ1 operates within its safe operating area (SOA)?
  To ensure the LM5143QRWGRQ1 operates within its SOA, monitor the input voltage, output current, and junction temperature. Use the thermal resistance (RθJA) and maximum junction temperature (TJ) ratings to calculate the maximum allowed power dissipation. Also, ensure the output current is within the recommended range.
• What is the recommended input capacitor type and value for the LM5143QRWGRQ1?
  A low-ESR ceramic capacitor (X5R or X7R) with a value of 10-22 μF is recommended for the input capacitor. This helps to filter out high-frequency noise and ensure stable operation.
• How do I optimize the output filter design for the LM5143QRWGRQ1?
  Optimize the output filter design by selecting the right inductor value and type, and ensuring the output capacitor is a low-ESR ceramic capacitor. Use the datasheet's output filter design equations and TI's WEBENCH tool to help with the design process.
• What is the maximum allowed voltage drop across the LM5143QRWGRQ1's internal FETs?
  The maximum allowed voltage drop across the LM5143QRWGRQ1's internal FETs is approximately 1.5 V. Exceeding this voltage drop may lead to reduced efficiency and increased heat generation.