Toshiba provides a recommended PCB layout in the application note (AN-1143) for the RN4985FE,LF. It includes guidelines for component placement, trace routing, and thermal management to ensure optimal performance and minimize electromagnetic interference (EMI).
The input capacitor value depends on the input voltage, output voltage, and output current. 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 (AN-1143) for more specific guidance.
While the datasheet specifies an operating temperature range of -40°C to 125°C, the maximum ambient temperature for reliable operation depends on the specific application and thermal management. As a general guideline, it's recommended to keep the ambient temperature below 85°C to ensure reliable operation and minimize thermal stress.
To ensure EMC compliance, follow the recommended PCB layout and component placement guidelines in the application note (AN-1143). Additionally, use shielding, filtering, and grounding techniques to minimize electromagnetic radiation and susceptibility. Consult the relevant EMC standards (e.g., CISPR 22, FCC Part 15) for specific requirements.
The output capacitor value and type depend on the output voltage, output current, and desired ripple voltage. A general guideline is to use a low-ESR capacitor (e.g., ceramic, film, or electrolytic) with a value between 10uF to 47uF. Consult the application note (AN-1143) for more specific guidance and consider the output capacitor's impedance characteristics.
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RN4985FE,LF(CT Overview
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