FEATURES：

 

DESCRIPTION：

 

The SCT2250 is a high efficiency synchronous step-down DC-DC converter with 4.5V-18V input voltage range and adjustable output voltage down to 0.6V. It offers a small saving 2mmx3mm QFN package that supplies continuous 5A output current. The device fully integrates high-side and low-side power MOSFETs with 42mΩ/17mΩ on-resistance to minimize the conduction loss.
The SCT2250 adopts a Constant On-Time (COT) control to provide fast transient response and easy loop stabilization. The switching clock frequency can be selected from 400KHz, 800KHz and 1.2MHz for optimization of the filter size and output voltage ripple. The device offers soft start to prevent inrush current during the startup of output voltage ramping. Power Good with open drain output signals that the output voltage is within regulation.
The SCT2250 has the MODE pin to select Pulse Frequency Modulation (PFM) operation mode to achieve the light load power save, or Ultrasonic Mode (USM) to keep the switching frequency above audible frequency areas during light-load or no-load conditions. 
Full protection includes over current protection, under-voltage protection, and thermal shutdown.
The converter requires a minimum number of external components and is available in a QFN- 12 (2mmx3mm) package.

 

 

APPLICATIONS：