Texas Instruments provides a recommended PCB layout in the datasheet, but it's also recommended 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. In general, low-ESR capacitors with a high ripple current rating are recommended. The datasheet provides guidelines for capacitor selection, but it's also recommended to consult the capacitor manufacturer's datasheet and application notes.
The TPS40074RHLR is rated for operation up to 125°C, but the maximum ambient temperature for reliable operation depends on the specific application and the thermal design of the system. It's recommended to follow the thermal design guidelines in the datasheet and to perform thermal simulations to ensure reliable operation.
To ensure stability and prevent oscillations, it's recommended to follow the compensation guidelines in the datasheet, use a stable input voltage, and minimize the output capacitance. Additionally, it's recommended to perform stability analysis using simulation tools such as SPICE or MATLAB.
The recommended input voltage range for optimal performance is 2.7V to 5.5V, but the device can operate with input voltages as low as 2.5V. However, the output voltage regulation and efficiency may be affected at lower input voltages.
TPS40074RHLR datasheet
by Texas Instruments
