DC/DC converter ICs tuned for light-load efficiency

September 14, 2015 // By Graham Prophet
A light-load algorithm improves efficiency of DC-DC buck converters from Diodes Inc. Efficient operation combined with the standard pinout, space saving TSOT26 package are key features of the 1.5A AP65101 and 2A AP65201 synchronous DC-DC buck converters.

For consumer electronics, such as TVs, set-top boxes, computer monitors and home audio, these devices achieve maximum continuous current efficiencies up to 97% with improved efficiency at lower loads ensured by an automatic light-load algorithm.

The AP65101/201 buck converters are designed for low-voltage regulation, especially in distributed power architectures, and operate from 4.5V to 16V inputs while delivering adjustable output voltage from 0.8V up to 80% of VIN. A low quiescent supply current and integrated high- and low-side switches with low RDS(ON) both help to reduce power loss. Protection features, including under-voltage lockout, over-current, over-voltage and over-temperature, help prevent damage to downstream components and stress-induced premature component failure. The device enable pin also has a high voltage tolerance of up to 6V. Current-mode operation enables fast transient response and easy loop stabilisation; features such as programmable soft-start and a 500 kHz switching frequency contribute to ease of use.

AP65101 is priced at $0.21 (1000) and the AP65201 is $0.25.

Diodes; www.diodes.com