A good PCB layout for the TPS3700QDDCRQ1 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 output voltage and current requirements. 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. The capacitor's ESR (Equivalent Series Resistance) should also be low enough to minimize voltage ripple.
The TPS3700QDDCRQ1 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 TPS3700QDDCRQ1 can be adjusted by using a resistive divider network between the VOUT and ADJ pins. The output voltage can be calculated using the formula: VOUT = 1.25V x (1 + R1/R2), where R1 and R2 are the resistors in the divider network.
The thermal derating curve for the TPS3700QDDCRQ1 is not explicitly stated 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% for every 1°C increase in temperature above 25°C.
TPS3700QDDCRQ1 datasheet
by Texas Instruments
