A good PCB layout for the TPS40007DGQ involves keeping the input and output capacitors close to the device, using a solid ground plane, and minimizing the length of the input and output traces. Additionally, it's recommended to use a separate power plane for the input voltage and to keep the noise-sensitive analog traces away from the switching node.
The choice of input and output capacitors for the TPS40007DGQ depends on the specific application requirements. In general, it's recommended to use low-ESR capacitors with a high ripple current rating. For the input capacitor, a 10uF to 22uF ceramic capacitor is a good starting point, while for the output capacitor, a 10uF to 47uF ceramic capacitor is suitable. The capacitor values may need to be adjusted based on the specific application requirements and the output voltage ripple.
The TPS40007DGQ is rated for operation from -40°C to 125°C ambient temperature range. However, the device's performance and reliability may be affected at extreme temperatures, and it's recommended to derate the device's performance accordingly.
To ensure the TPS40007DGQ is stable and doesn't oscillate, it's recommended to follow the layout guidelines, use the recommended component values, and ensure that the input and output capacitors are properly decoupled. Additionally, it's recommended to add a small ceramic capacitor (e.g., 10nF) between the VIN and GND pins to filter out high-frequency noise.
The TPS40007DGQ is capable of delivering up to 2A of output current. However, the actual output current capability may be limited by the input voltage, output voltage, and the device's thermal performance. It's recommended to consult the datasheet and application notes for more information on the device's output current capability.
TPS40007DGQ datasheet
by Texas Instruments
