A good PCB layout for the TPS70148PWP 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. Additionally, it's recommended to use a separate analog and digital ground plane to reduce noise coupling.
To ensure stability, it's essential to follow the recommended component values and PCB layout guidelines. Additionally, the output capacitor should be selected based on the output voltage and current requirements. A minimum of 10uF output capacitance is recommended, and the ESR of the capacitor should be less than 1 ohm.
The TPS70148PWP can handle a maximum input voltage of 18V. However, it's recommended to operate the device within the specified input voltage range of 5.5V to 15V for optimal performance and reliability.
The TPS70148PWP is rated for operation up to 125°C. However, the device's performance and reliability may degrade at high temperatures. It's recommended to derate the output current and voltage according to the temperature derating curve provided in the datasheet.
The output voltage of the TPS70148PWP can be calculated using the following formula: Vout = (R1/R2) * (Vref), where R1 and R2 are the resistors connected to the FB pin, and Vref is the internal reference voltage (1.22V).
TPS70148PWP datasheet
by Texas Instruments
