A good PCB layout for the TPS51120RHBR involves placing the input and output capacitors close to the device, using a solid ground plane, and minimizing the length of the input and output traces. TI provides a recommended PCB 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. The datasheet provides guidelines for capacitor selection, and TI's capacitor selection tool can also be used.
The TPS51120RHBR can handle input voltages up to 6.5V, but it's recommended to operate within the specified input voltage range of 2.7V to 5.5V for optimal performance and reliability.
The output voltage of the TPS51120RHBR can be adjusted by using a resistor divider network between the FB pin and the output voltage. The datasheet provides a formula to calculate the required resistor values for a specific output voltage.
The thermal derating curve for the TPS51120RHBR is provided in the datasheet, which shows the maximum output current vs. ambient temperature. The device can deliver up to 2A of output current at room temperature, but the output current must be derated at higher temperatures.
TPS51120RHBR datasheet
by Texas Instruments
