ROHM recommends a PCB layout with a thermal pad connected to a large copper area on the bottom layer, and multiple vias to dissipate heat efficiently. A minimum of 2oz copper thickness is recommended.
To ensure stable operation, ROHM recommends a soft-start circuit to limit inrush current during power-up, and a slow power-down sequence to prevent voltage overshoot. Additionally, a bypass capacitor (e.g., 10uF) should be placed close to the IC to filter out noise.
The maximum allowed voltage on the EN (enable) pin is 6V, which is higher than the recommended operating voltage of 5V. However, it's essential to ensure that the EN pin voltage does not exceed the maximum rating to prevent damage to the IC.
While the RQ3E120BNTB is rated for operation up to 125°C, ROHM recommends derating the output current and voltage to ensure reliable operation in high-temperature environments. Consult the datasheet and ROHM's application notes for specific guidance.
ROHM recommends using a oscilloscope to monitor the input and output voltages, as well as the EN and PG pins. Check for voltage drops, oscillations, and noise on the output. Also, verify that the input voltage is within the recommended range and that the PCB layout is correct.
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RQ3E120BNTB Overview
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