EZBuck regulator is I2C-controllable

Alpha and Omega Semiconductor introduced the EZBuck regulator family with I² C control. The first two, the 4-A AOZ2231CQI-01 and the 8-A AOZ2233CQI-02, provide a compact, efficient power converter solution for next-generation chipsets and FPGAs. Microprocessors and SoCs often use dynamic voltage scaling to reduce power dissipation and improve system performance, which often requires several external components. The 4-A AOZ2231CQI-01 and the 8-A AOZ2233CQI-02 make the design of such converters simple by allowing the system designer to control the output voltage from 0.6 V to 1.79 V using an I² C interface with 9.375-mV steps.

Both the 4-A and the 8-A devices are available in a footprint-compatible QFN 4 x 4-mm package, allowing designers an easy upgrade path as power requirements increase. The devices accept an input voltage range from 6.5 V to 28 V with a built-in 5.3-V regulator, making single-supply operation possible. The proprietary COT architecture provides ultra-fast load transient response performance and allows stable and low-voltage ripple operation with small ceramic capacitors. Competing solutions often need to generate a larger output ripple voltage to stabilize the circuit. Additionally, the input feed-forward feature provides a constant switching frequency over the entire input voltage range, further alleviating noise concerns.