XCL102/XCL103 Step-Up Micro DC/DC Converters Torex XCL102/XCL103 Step-Up micro DC/DC Converters combine an inductor and control IC in one small package, minimizing PCB area space requirements. Support for applications that require an internally fixed output is allowed through a wide operating voltage range of 0.9V to 6.0V. Two controls are available, PWM (XCL102) and automatic PWM/PFM switching control (XCL103).