ROHM recommends a 2-layer or 4-layer PCB with a thermal relief pattern on the bottom layer to improve heat dissipation. A minimum of 1 oz copper thickness is recommended for the PCB.
To ensure stable operation with a high-ESR output capacitor, add a 10nF to 22nF ceramic capacitor in parallel with the output capacitor to reduce the overall ESR.
The maximum allowed voltage on the EN pin is 6V. Exceeding this voltage may damage the device.
While the ML9470-12GAZ0AA is rated for operation up to 105°C, it's essential to consider the derating curves and thermal management to ensure reliable operation in high-temperature environments.
To minimize EMI, use a shielded inductor, keep the switching node (SW) as short as possible, and add a 10nF to 22nF capacitor between the VIN and GND pins to reduce noise.
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ML9470-12GAZ0AA Overview
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