Texas Instruments provides a recommended PCB layout in the datasheet, but it's also important to follow general best practices for PCB design, such as keeping the input and output capacitors close to the device, using a solid ground plane, and minimizing trace lengths and widths to reduce parasitic inductance and capacitance.
To ensure stability, make sure to follow the recommended component values and PCB layout, and also consider the output capacitor's ESR (Equivalent Series Resistance) and ESL (Equivalent Series Inductance) when selecting the capacitor. Additionally, the datasheet provides a stability analysis section that can help with this.
The maximum input voltage is not explicitly stated in the datasheet, but according to the Absolute Maximum Ratings section, the device can handle up to 18V. However, it's recommended to operate the device within the recommended operating conditions to ensure reliable operation.
The TPS3103E15DBVT is rated for operation up to 125°C, but the device's performance and reliability may degrade at higher temperatures. It's essential to consider the device's thermal characteristics, such as junction temperature and thermal resistance, when designing for high-temperature applications.
The output voltage ripple can be calculated using the formula provided in the datasheet, which takes into account the output capacitor's value, ESR, and ESL, as well as the switching frequency and inductor value. Additionally, the datasheet provides a ripple calculation example to help with this.
TPS3103E15DBVT datasheet
by Texas Instruments
