ROHM recommends a thermal pad on the bottom of the package, connected to a large copper area on the PCB to dissipate heat efficiently. A minimum of 2oz copper thickness is recommended, and the thermal pad should be connected to a ground plane or a dedicated heat sink.
To ensure stable operation with a high-impedance input source, add a 1kΩ to 10kΩ resistor in series with the input pin to prevent oscillation. Additionally, a 10nF to 100nF capacitor can be added in parallel with the input pin to filter out high-frequency noise.
The maximum allowed voltage on the enable pin (EN) 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 supply voltage (VIN) to prevent damage to the device.
The BD2220G-LBTR is rated for operation up to 125°C, but it's essential to consider the derating of the device's performance and reliability at high temperatures. ROHM recommends consulting the datasheet and application notes for specific guidance on high-temperature operation.
To minimize EMI, use a shielded layout, keep the switching node (SW) as short as possible, and use a common-mode choke or ferrite bead on the input and output lines. Additionally, consider adding a 10nF to 100nF capacitor between the VIN and GND pins to filter out high-frequency noise.
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