A good PCB layout for the TPS3700QDSERQ1 involves placing the device close to the power source, using a solid ground plane, and keeping the input and output traces short and wide to minimize inductance and resistance. Additionally, it's recommended to use a 10uF ceramic capacitor between the VIN and GND pins to filter out noise.
The output capacitor should be chosen based on the desired output voltage ripple, output current, and operating frequency. A general rule of thumb is to use a capacitor with a capacitance value of at least 10uF and a voltage rating of 1.5 to 2 times the output voltage. X5R or X7R ceramic capacitors are recommended due to their low ESR and high reliability.
The TPS3700QDSERQ1 can handle input voltages up to 18V, but it's recommended to keep the input voltage below 15V to ensure reliable operation and minimize power dissipation.
The output voltage of the TPS3700QDSERQ1 can be adjusted by using a resistive divider network between the output and the FB pin. The output voltage is determined by the ratio of the resistors and the internal reference voltage of 0.8V.
The thermal derating curve for the TPS3700QDSERQ1 is typically provided in the datasheet or can be obtained from the manufacturer. It shows the maximum power dissipation of the device as a function of ambient temperature. As a general rule, the device should be derated by 1% per degree Celsius above 25°C to ensure reliable operation.
TPS3700QDSERQ1 datasheet
by Texas Instruments
