Texas Instruments provides a recommended PCB layout in the datasheet, but it's also recommended to follow general guidelines for high-frequency PCB design, such as using a solid ground plane, minimizing trace lengths, and using bypass capacitors to reduce noise and ringing.
The output capacitor should be chosen based on the output voltage, output current, and desired ripple voltage. A general rule of thumb is to use 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 minimize voltage ripple.
The TPS3703A5180DSER has an absolute maximum input voltage rating of 18V, but it's recommended to operate the device within the recommended input voltage range of 4.5V to 15V to ensure reliable operation and minimize the risk of damage.
The TPS3703A5180DSER has a built-in OVP feature that can be enabled by connecting the OVP pin to a voltage divider network that sets the OVP threshold. The OVP threshold should be set to a voltage slightly higher than the maximum output voltage to prevent damage to the device and downstream components.
The thermal derating curve for the TPS3703A5180DSER is not explicitly provided in the datasheet, but it can be estimated based on the device's thermal resistance and maximum junction temperature. As a general rule, the device's output current should be derated by 1-2% per degree Celsius above 25°C to prevent overheating and ensure reliable operation.
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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.
