Texas Instruments provides a recommended PCB layout in the datasheet, but it's also important to follow general best practices for switching regulator layout, such as keeping the input and output capacitors close to the IC, using a solid ground plane, and minimizing trace lengths and widths.
To ensure stability, make sure to follow the recommended component values and layout, and also add a small ceramic capacitor (e.g. 10nF) between the VOUT and GND pins to filter out high-frequency noise. Additionally, ensure that the input voltage is within the recommended range and that the output capacitor is of sufficient value and type.
The LM3658SD-B is rated for operation from -40°C to 125°C, but the maximum ambient temperature range depends on the specific application and the device's power dissipation. It's recommended to derate the device's power dissipation according to the ambient temperature to ensure reliable operation.
Yes, the LM3658SD-B is qualified for automotive and high-reliability applications, and meets the requirements of the AEC-Q100 standard. However, it's essential to follow the recommended design and layout guidelines, and to perform thorough testing and validation to ensure the device meets the specific application requirements.
The power dissipation of the LM3658SD-B can be calculated using the formula: Pd = (Vin - Vout) x Iout x Efficiency. The efficiency can be estimated from the datasheet or measured in the actual application. It's essential to ensure that the device's power dissipation is within the recommended limits to prevent overheating and ensure reliable operation.
LM3658SD-B datasheet
by Texas Instruments
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