PMR25HZPJV4L0 - ROHM Semiconductor

PMR25HZPJV4L0 Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal performance of the PMR25HZPJV4L0?
  ROHM recommends a PCB layout with a solid ground plane, short and wide traces for power and ground, and a decoupling capacitor (e.g., 100nF) close to the device. A 4-layer PCB with a dedicated power plane and a dedicated ground plane is also recommended.
• How do I ensure the PMR25HZPJV4L0 is properly thermally managed?
  ROHM recommends a thermal management strategy that includes a heat sink, thermal interface material, and a PCB design that allows for good airflow. The device's thermal pad should be connected to a solid ground plane or a dedicated thermal pad on the PCB.
• What is the maximum allowed voltage on the EN pin, and how do I ensure it's not exceeded?
  The maximum allowed voltage on the EN pin is 6V. To ensure it's not exceeded, use a voltage divider or a voltage regulator to limit the voltage to the EN pin. Additionally, use a pull-down resistor to prevent unwanted enablement.
• How do I handle the inrush current during startup, and what are the recommended soft-start strategies?
  To handle inrush current, use a soft-start strategy that ramps up the output voltage slowly. ROHM recommends a soft-start time of 1-10ms. You can implement soft-start using an external circuit or a dedicated IC. Consult ROHM's application notes for more information.
• What are the recommended input and output capacitors for the PMR25HZPJV4L0?
  ROHM recommends using low-ESR capacitors with a capacitance value of 10-22uF for the input and output. The capacitors should be rated for the maximum input voltage and have a low equivalent series resistance (ESR) to minimize voltage ripple and ensure stability.