ROHM recommends a 4-layer PCB with a solid ground plane and a separate power plane for the IC. Keep the input and output traces short and away from noise sources. Use a 0.1uF decoupling capacitor between VCC and GND, and a 10uF capacitor between VIN and GND.
Ensure good airflow around the IC, and use a heat sink if necessary. Avoid placing components that generate heat near the MCR01MRTF3003. Use thermal interface material (TIM) between the IC and heat sink, if used.
Although the datasheet specifies a maximum VIN of 5.5V, it's recommended to keep VIN below 5V to ensure reliable operation and prevent damage to the IC.
While the MCR01MRTF3003 can operate at high frequencies, it's not designed for high-frequency switching applications. ROHM recommends using a dedicated high-frequency switching regulator for such applications.
Check the input voltage, output load, and PCB layout for any issues. Verify that the decoupling capacitors are properly connected and of the correct value. Use an oscilloscope to monitor the output voltage and input voltage ripple. Consult ROHM's application notes and technical support for further assistance.
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