Because a power circuit can be configured by simply adding two ceramic capacitors to the external components, the devices contribute to space-saving on the board and shortening of development time. The integrated coil simplifies the board layout and minimises unwanted radiation noise and circuit operating trouble.
The operating voltage range is 2.5-5.5V, and the output voltage is selectable in the range 0.8-3.6V in steps of 0.05V. A low switching frequency of 1.2MHz realises low noise. PWM control (XCL221) or PWM/PFM auto switching control (XCL222) can be selected for the control method.
The XCL221/XCL222 series uses HiSAT-COT, which is suitable for wireless and wearable devices that require a fast transient response and portable devices and GPS watches that incorporate a CPU.