Texas Instruments recommends a 2-layer or 4-layer PCB with a solid ground plane on the bottom layer and a thermal relief pattern on the top layer to ensure good thermal performance. A thermal pad on the bottom of the package should be connected to the ground plane.
To ensure reliable start-up and operation with a low input voltage, it is recommended to use a high-quality input capacitor with low ESR, and to ensure that the input voltage rises slowly (e.g., with a soft-start circuit) to prevent inrush currents.
The maximum allowed output capacitance for stable operation depends on the specific application and output voltage. As a general rule, a maximum output capacitance of 10uF to 22uF is recommended. However, it is recommended to consult the datasheet and application notes for specific guidance.
To protect the device from overvoltage and undervoltage conditions, it is recommended to use a voltage supervisor or a power-on reset circuit to monitor the input voltage and shut down the device if it falls outside the recommended operating range.
Texas Instruments recommends using a pi-filter configuration with a common-mode choke and X-capacitors to reduce EMI emissions. The specific component values and configuration will depend on the application and operating frequency.
LM8850URE/NOPB datasheet
by Texas Instruments
Findchips
