Texas Instruments provides a recommended PCB layout in the datasheet, but it's also important to follow general high-frequency PCB design guidelines, such as using a solid ground plane, minimizing trace lengths, and using vias to connect the input and output capacitors to the ground plane.
The selection of input and output capacitors depends on the specific application requirements, such as the input voltage range, output voltage, and ripple current. TI recommends using low-ESR capacitors with a voltage rating of at least 1.5 times the maximum input voltage. The output capacitor should be selected based on the output voltage and ripple current requirements.
The TPS40071PWP has an operating junction temperature range of -40°C to 150°C, but the maximum ambient temperature range depends on the specific application and the thermal design of the system. TI recommends using a thermal design that keeps the junction temperature below 125°C for optimal reliability and performance.
To ensure stability, follow the recommended PCB layout and component selection guidelines, and make sure the input and output capacitors are properly selected and placed. Additionally, TI recommends adding a small ceramic capacitor (e.g., 10nF) between the VIN and GND pins to improve stability.
The TPS40071PWP has a maximum output current capability of 1.5A, but the actual output current capability depends on the input voltage, output voltage, and thermal design of the system. TI recommends derating the output current based on the junction temperature and the thermal design of the system.
TPS40071PWP datasheet
by Texas Instruments
Findchips
