SLUSFR0A July 2024 – August 2024 TPS51375
PRODUCTION DATA
The TPS51375 device offers remote sense function through the FB and GSNS pins. Remote sense function compensates a potential voltage drop on the PCB traces, thus helps maintain VOUT tolerance under steady state operation and load transient event. Connecting the FB voltage divider resistors to the remote location allows sensing the output voltage at a remote location. The connections from the FB voltage divider resistors to the remote location must be a pair of PCB traces with at least 12-mil trace width, and must implement Kelvin sensing across a high bypass capacitor of 0.1μF or higher. The ground connection of the remote sensing signal must be connected to the GSNS pin. The VOUT connection of the remote sensing signal must be connected to the feedback resistor divider with the lower feedback resistor, RFB_LS, terminated at the GSNS pin. To maintain stable output voltage and minimize the ripple, the pair of remote sensing lines must stay away from any noise sources, such as inductor and SW nodes, or high frequency clock lines. TI recommends to shield the pair of remote sensing lines with ground planes above and below. Single-ended Vo sensing is often used for local sensing. For this configuration, connect the higher FB resistor, RFB_HS, to a high-frequency local bypass capacitor of 0.1μF or higher, and short GSNS to AGND.