The TPS6213x synchronous switched mode power converters are based on DCS-Control (Direct Control with Seamless Transition into power save mode), an advanced regulation topology that combines the advantages of hysteretic, voltage mode, and current mode control including an AC loop directly associated to the output voltage. This control loop takes information about output voltage changes and feeds it 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 PWM (Pulse Width Modulation) mode for medium and heavy load conditions and a power save mode at light loads. During PWM, the device operates at its nominal switching frequency in continuous conduction mode. This frequency is typically approximately 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. Since DCS-Control supports both operation modes within one 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 four external components. An internal current limit supports nominal output currents of up to 3 A.

The TPS6213x family offers both excellent DC voltage and superior load transient regulation, combined with very low output voltage ripple, minimizing interference with RF circuits.