A good PCB layout for the TPS51225CRUKT involves placing the input capacitors close to the VIN pin, using a solid ground plane, and keeping the high-current paths short and wide. TI provides a recommended layout in the datasheet and application notes.
Choose input capacitors with low ESR and high ripple current rating. For output capacitors, choose ones with low ESR and high capacitance. TI recommends using ceramic or polymer capacitors with X5R or X7R dielectrics. The datasheet provides guidelines for capacitor selection.
The TPS51225CRUKT is rated for operation from -40°C to 125°C. However, the maximum ambient temperature range depends on the specific application and thermal design. TI recommends following the thermal design guidelines in the datasheet to ensure reliable operation.
To ensure stability, follow the recommended component values and PCB layout guidelines in the datasheet. Additionally, ensure that the input and output capacitors are properly selected and placed. TI also recommends adding a small ceramic capacitor (e.g., 10nF) between the VOUT and GND pins to improve stability.
The TPS51225CRUKT is rated for a maximum output current of 2.5A. However, the actual output current capability depends on the input voltage, output voltage, and thermal design. TI recommends following the thermal design guidelines in the datasheet to ensure reliable operation.
TPS51225CRUKT datasheet
by Texas Instruments
