Texas Instruments provides a recommended PCB layout in the datasheet, but it's also recommended to follow general high-frequency PCB design guidelines, such as keeping the power traces short and wide, using a solid ground plane, and minimizing vias and thermal reliefs.
The output capacitor selection depends on the output voltage, output current, and desired ripple voltage. A general rule of thumb is to choose a capacitor with a capacitance value of at least 10uF and a voltage rating of at least 1.5 times the output voltage. Additionally, the capacitor's ESR (Equivalent Series Resistance) should be low enough to ensure stability.
The TPS652170RSLT has an absolute maximum input voltage rating of 18V, but the recommended operating input voltage range is 6.5V to 14V. Exceeding the absolute maximum rating can damage the device.
The TPS652170RSLT has a built-in OVP feature that can be enabled by connecting the OVP pin to a voltage divider network. The OVP threshold is set by the voltage divider ratio, and the device will shut down if the output voltage exceeds the set threshold.
The thermal derating curve for the TPS652170RSLT is not explicitly provided in the datasheet, but it can be estimated based on the device's power dissipation and thermal resistance. As a general rule, the device's output current should be derated by 1-2% per degree Celsius above the maximum operating temperature of 85°C.
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About Texas Instruments
Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.
