Diodes Incorporated's AP65552, AP65452, and AP65450 are adaptive constant on-time mode synchronous buck converters providing high efficiency, excellent transient response and high DC output accuracy for low-voltage regulation in digital TV and monitors. They also feature programmable soft-start, UVLO, OTP and OCP to protect the circuit.

The constant-on-time control scheme handles wide input/output voltage ratios and provides low external component count. The AP65450 supports seamless transition between continuous conduction mode (CCM) at higher load conditions and discontinuous conduction mode (DCM) at lighter load conditions to maintain high efficiency at light load conditions.

The AP65452 and AP65552 are at fixed 650 KHz to achieve a good output stability.

This IC is available in SO-8EP package.