The SCT21C1 is a monolithic, step-down switch-mode converter with built-in internal 6mΩ High-Side and 3mΩ Low-Side Power MOSFETs. The device achieves 12A of continuous output current from a 2.7V to 6V input voltage range, with excellent load and line regulation. The output voltage can be regulated to as low as 0.4V.

The SCT21C1, adopting the constant-on time (COT) mode control provides fast transient response and eases loop stabilization, greatly simplifies the converter off-chip configuration. The switching clock frequency can be selected from 1.1MHz, 2.2MHz, 2.5MHz and 3MHz for optimization of the filter size and output voltage ripple. The frequency dither option minimizes radiated electromagnetic emission.

The SCT21C1 has a MODE/SYNC pin to select Pulse Frequency Modulation (PFM) operation mode to achieve the light load power save or Forced Continuous Conduction Mode (FCCM) to achieve low light load ripple.

The SCT21C1 has an optional remote sensing feature that maximizes voltage regulation at the point-of-load, and the device achieves better than ±1% output voltage accuracy under all operating conditions. The I²C interface supports dynamic voltage adjustment with programmable slew rates to balance performance and power consumption.

It includes full protection features, such as cycle-by-cycle current limit and hiccup over current protection, output under-voltage protection, input under-voltage lockout and over-voltage protection, and thermal shutdown.

The SCT21C1 requires a minimal number of external components and is available in a space-saving FCLGA-16L 2.55mm*3.55mm package with Wettable Flank.