Step Up DC-DC Converter – 24V/10mA Output from 12V DC Input – Compatible to TO220 LDO

The project demonstrated here is a small-size solution, high-efficiency, low-cost, and low-EMI step-up DC/DC module for LDO regulator replacement. This small size module helps save on solution size and cost while also eliminating the need for a heatsink. The module takes up the same amount of space as a TO-220 package and is pin-to-pin compatible with TO-220 regulators, such as LM7805. The project is based on LM3578, which is a switching regulator that can easily be set up for such DC-to-DC voltage conversion circuits as the buck, boost, and inverting configurations. In this board, the chip is configured as a boost converter. Switching frequency sets at 100Khz. The project provides 24V output from 12V input. The project can output up to 20mA of current but it is safe to draw continuous 10mA.