A good PCB layout for the UCC27211DDA involves keeping the high-frequency switching nodes (e.g., SW and VIN) away from sensitive analog nodes, using a solid ground plane, and minimizing loop areas. TI provides a recommended layout in the datasheet and application notes.
Choose an input capacitor with a voltage rating that exceeds the maximum input voltage, a capacitance value that meets the recommended range (e.g., 10-22 μF), and a low ESR (equivalent series resistance) to minimize voltage ripple.
The UCC27211DDA can deliver up to 2 A of output current, but this depends on the input voltage, output voltage, and thermal conditions. Be sure to check the datasheet for thermal derating and output current limitations.
The output voltage of the UCC27211DDA can be adjusted by changing the resistor divider ratio (RFB1 and RFB2) connected to the FB pin. Use TI's voltage regulator calculator or consult the datasheet for guidance.
The EN (enable) pin is used to turn the regulator on or off. When EN is high, the regulator is enabled, and when EN is low, the regulator is disabled and enters a low-power shutdown mode.
UCC27211DDA datasheet
by Texas Instruments
