STMicroelectronics provides a recommended PCB layout in the application note AN5153, which includes guidelines for component placement, routing, and thermal management to ensure optimal performance and minimize electromagnetic interference (EMI).
The input capacitor values depend on the input voltage, output voltage, and switching frequency. A general guideline is to use a capacitor with a value between 10uF to 22uF, with a voltage rating of at least 1.5 times the input voltage. However, it's recommended to consult the application note AN5153 and perform simulations to determine the optimal capacitor values for your specific design.
The LDK220C40R is rated for operation up to 105°C ambient temperature, but it's recommended to derate the device's performance and consider thermal management strategies to ensure reliable operation above 85°C ambient temperature.
To ensure EMC compliance, follow the guidelines in the application note AN5153, which includes recommendations for PCB layout, component selection, and shielding. Additionally, perform EMC testing and simulation to validate your design's compliance with relevant standards.
The recommended output capacitor type is a low-ESR ceramic capacitor, such as X5R or X7R, with a value between 10uF to 47uF. The exact value depends on the output voltage, switching frequency, and load characteristics. Consult the application note AN5153 and perform simulations to determine the optimal output capacitor value for your specific design.
LDK220C40R datasheet
by STMicroelectronics
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