The APW7063 integrates PWM and linear controller, as well as the monitoring and protection functions into a single package. The synchronous PWM cont roller which drives dual N-channel MOSFETs, which provides one controlled power outputs with under-voltage and over-current protect ions . Linear cont roller drives an ext ernal N-c hannel MOS FE T with under-volt age protection. APW7063 provides excellent regulation for output load variation. An internal 0.8V temperature-compensated reference voltage is designed to meet the various low output voltage applications . A PW 7063 inc ludes a 250kHz free-running t riangle-wave osc illator that is adjust able from below 70KHz to over 800KHz. A power-on-reset (POR) circuit limits the VCC minimum opearting s upply voltage to ass ure the c ontroller working well. Over current protec tion is achieved by monit oring t he volt age drop ac ros s the low s ide MOSFET, eliminating the need for a current sensing resistor and short circuit condition is detected through the FB pin. The over-current protection t riggers the soft -start function until the fault events be removed, but Under-voltage protection will shutdown IC directly. Pull the COMP pin below 0.4V will shutdown t he controller, and both gate drive signals will be low