The TPSM5D1806E supports differential remote sense for accurate output regulation when operated in multi-phase configuration. In multi-phase configuration, FB1 and RS– pins are used for remote sensing. The FB1 pin must be connected to the mid-point of the resistor divider. Additionally, the RS– pin must be connected to the negative sensing point. The FB1 and RS– pins are extremely high-impedance input terminals of the true differential remote sense amplifier. The feedback resistor divider must use resistor values much less than 100 kΩ to reduce susceptibility to noise. A simple rule of thumb is to use a 10-kΩ lower divider resistor and then size the upper resistor to achieve the desired ratio.

When configured as a dual-output device, connect the RS– pin to AGND.