The AX3023A series are monolithic IC designed for a step-down DC/DC converter, and own the ability of driving a 1A load without additional transistor. It saves board space. The external shutdown function can be controlled by logic level and then come into standby mode. The internal compensation makes feedback control having good line and load regulation without external design. Regarding protected function, thermal shutdown is to prevent over temperature operating from damage, and current limit is against over current operating of the output switch. The AX3023A operates at a switching frequency of 38KHz. Other features include a guaranteed +3% tolerance on output voltage under specified input voltage and output load conditions, The chips are available in SOT23-5L and SOP-8L packages.