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, such as the input voltage range, output voltage, and ripple current. Texas Instruments recommends using low-ESR capacitors with a minimum capacitance of 10uF for the input and output. Additionally, the capacitor's voltage rating should be higher than the maximum input voltage.
The TPS40140RHHTG4 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. Texas Instruments recommends derating the device's power dissipation based on the ambient temperature to ensure reliable operation.
The TPS40140RHHTG4 has a built-in overcurrent protection feature that can be enabled by connecting the OC pin to the VIN pin through a resistor. The overcurrent threshold can be set by selecting the appropriate resistor value. Additionally, the device also has a thermal shutdown feature that will turn off the device if the junction temperature exceeds 150°C.
The recommended input voltage range for the TPS40140RHHTG4 is 2.7V to 5.5V, but the device can operate with input voltages as low as 2.5V and as high as 6V. However, the device's performance and efficiency may be affected at these extreme input voltage ranges.
TPS40140RHHTG4 datasheet
by Texas Instruments
