LM5140QRWGRQ1 datasheet by Texas Instruments

LM5140QRWGRQ1 Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for the LM5140QRWGRQ1 to minimize EMI?
  A good PCB layout for the LM5140QRWGRQ1 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 LM5140QRWGRQ1 operates within its safe operating area (SOA)?
  To ensure the LM5140QRWGRQ1 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 input voltage is within the recommended range.
• What is the recommended input capacitor type and value for the LM5140QRWGRQ1?
  The recommended input capacitor type is a low-ESR ceramic capacitor with a value of 10-22 μF. The capacitor should be placed close to the VIN pin and have a voltage rating of at least 1.5 times the maximum input voltage.
• How do I optimize the output filter design for the LM5140QRWGRQ1?
  To optimize the output filter design, use the recommended output capacitor value and type (e.g., 10-22 μF ceramic capacitor). Place the capacitor close to the VOUT pin and ensure the output inductor has a low DCR (direct current resistance) and is rated for the maximum output current.
• What is the maximum allowed output current for the LM5140QRWGRQ1?
  The maximum allowed output current for the LM5140QRWGRQ1 is 2 A. However, the actual output current capability may be limited by the thermal performance of the PCB and the output inductor.