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.
The selection of the inductor depends on the output current, switching frequency, and output voltage ripple requirements. TI provides an inductor selection guide in the datasheet, and online tools such as the TI Inductor Selection Tool can also be used to find a suitable inductor.
The maximum input voltage rating of the TPS51220ARSNR is 18V, but it's recommended to derate the input voltage to 15V to ensure reliable operation and to prevent damage to the IC.
The output voltage of the TPS51220ARSNR can be adjusted by changing the resistor divider network connected to the FB pin. The datasheet provides a formula to calculate the required resistor values for a specific output voltage.
The thermal shutdown temperature of the TPS51220ARSNR is typically around 150°C, but this can vary depending on the specific device and operating conditions. It's recommended to consult the datasheet and to implement thermal monitoring and shutdown mechanisms in the system design.
TPS51220ARSNR datasheet
by Texas Instruments
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