The TPS6215x synchronous switched-mode power converter is based on DCS-Control topology, an advanced regulation topology that combines the advantages of hysteretic, voltage-mode, and current-mode control, including an ac loop directly associated with the output voltage. This control loop takes information about output voltage changes and feeds that information directly to a fast comparator stage. It sets the switching frequency, which is constant for steady-state operating conditions, and provides immediate response to dynamic load changes. To get accurate dc load regulation, a voltage feedback loop is used. The internally compensated regulation network achieves fast and stable operation with small external components and low-ESR capacitors.

The DCS-Control topology supports pulse-width modulation (PWM) mode for medium and heavy load conditions and a power-save mode at light loads. During PWM, it operates at its nominal switching frequency in continuous-conduction mode. This frequency is typically about 2.5 MHz or 1.25 MHz, with a controlled frequency variation depending on the input voltage. If the load current decreases, the converter enters power-save mode to sustain high efficiency down to very light loads. In power-save mode, the switching frequency decreases linearly with the load current. Because DCS-Control topology supports both operation modes within a single building block, the transition from PWM to power-save mode is seamless without effects on the output voltage.

Fixed-output voltage versions provide the smallest solution size and lowest current consumption, requiring only three external components. An internal current limit supports nominal output currents of up to 1 A.

The TPS6215x offers both excellent dc voltage and superior load transient regulation, combined with very low output voltage ripple, minimizing interference with RF circuits.