APPLICATION NOTE 254

Switch-Mode Converter Starts With Full Load Connected


Abstract: The start-up circuit is composed of microprocessor (µP) supervisory circuit MAX809L and charge pump circuit is used to monitor the boost converter output voltage. The high efficiency step-up controller MAX608 is used to boost output voltage and the charge pump circuit controlled by supervisory circuit MAX809L is used to connect the full load when the output voltage reaches its regulated level.