AP62500 Buck Converter Diodes Incorporated AP62500 Buck Converter offers a 4.5V to 18V wide input voltage range and 5A continuous output current. The AP62500 fully integrates a 47mΩ high-side power MOSFET and a 18mΩ low-side power MOSFET to deliver high-efficiency step-down DC-DC conversion. The device employs Constant On-Time (COT) control to achieve fast transient response, easy loop stabilization, and low output voltage ripple while minimizing the external component count.