SLUSEJ1 December 2021 TPSM8D6C24
The TPSM8D6C24 power module uses a fixed-frequency, proprietary current-mode control. The switching frequency can be selected from preset values through pinstrapping or PMBus programming. The output voltage is sensed through a true differential remote sense amplifier and internal resistor divider, then compared to an internal voltage reference by an error amplifier. An internal oscillator initiates the turn-on of the high-side power switch. The error amplifier output is buffered and shared through VSHARE among stacked devices. This shared voltage is compared to the sensed switch node current to drive a linear voltage ramp modulator with input voltage, output voltage, and switching frequency feedforward to regulate the average switch-node current. As a synchronous buck converter, the device normally works in continuous conduction mode (CCM) under all load conditions. The compensation components are integrated and programmable through the PMBus command Section 7.6.74 or with the external pin MSEL1 to select preset values based on switching frequency and output LC filters.