Diodes' AP62500 and AP62800 are high-efficiency 5 A and 8 A synchronous step-down DC/DC converters. By adopting constant on-time (COT) control, fast transient response and simple loop stabilization are achieved. To help designers optimize performance, the AP62500 and AP62800 have three selectable switching frequencies along with three selectable operation modes. Additionally, their soft-start times can be adjusted to prevent start-up inrush currents while also supporting tracking functions. Both devices include a full set of protection features to make the system more robust including overcurrent protection, undervoltage lockout, and thermal shutdown. The AP62500 has a 4.5 V to 18 V input voltage range while the AP62800 operates from 4.5 V to 17 V. Both devices have adjustable output voltages down to 0.6 V. The AP62500 and AP62800 are available in the V-QFN2030-12 (2 mm x 3 mm) package type and have the same pinout as the AP62600.