XCL201/XCL202 Series

Torex Semiconductor's XCL201/XCL201 series is a synchronous step-down micro DC/DC converter which integrates an inductor and a control IC in one tiny package. A stable power supply with an output current of 400 mA is configured using only two capacitors, connected externally. Operating voltage range is from 2.0 V to 6.0 V. Output voltage is internally set in a range from 0.8 V to 4.0 V in increments of 0.05 V. The device is operated by 1.2 MHz, and includes 0.42 Ω P-channel driver transistor and 0.52 Ω N-channel switching transistor. As for operation mode, the XCL202 series is automatic PWM/PFM switching control, allowing fast response, low ripple, and high efficiency over the full range of loads (from light load to heavy load). The series provides short-time turn-on by the soft start function, internally set in 0.25 ms (TYP). The series integrates CL auto-discharge function, enabling the electric charge stored at the output capacitor CL to be discharged via the internal auto-discharge switch located between the LX and VSS pins. When the devices enter stand-by mode, output voltage quickly returns to the VSS level as a result of this function.