The MB39A102 evaluation board is a surface mount circuit board with four channels of up conversion, down conversion and up/down conversion circuits. The internal structure consists of one channel of step-down type, two channels of transformer type, and one channel of Sepic type. A total of seven lines of output terminals are provided, supporting voltage settings from -7 V to +15 V and supplying a current Max 500 mA (Sepic type) at a power-supply voltage between +2.5 V and +6 V. The output circuit (ch1) can be changed to the Zata type by optional replacement of components. The board incorporates the protective functions that upon detection of a short circuit or activation of the under voltage lockout protection circuit, the short-circuit protection feature shuts off transistors to stop the output. Also, the short-circuit detection comparator can detect a short circuit through an external input (initial number P12). In addition, each channel can be controlled to be turned on and off and can be set for a soft-start.