I2C controllable EZBuck regulator supports DVS for FPGAs

Converters from Alpha and Omega Semiconductor support dynamic voltage scaling (DVS)/voltage margining to power the next generation chipsets and FPGAs.

The EZBuck regulators featuring I2C control. The first two members of the family are the 4.0A AOZ2231CQI-01 and the 8.0A AOZ2233CQI-02. The regulators provide a compact, efficient power converter solution for next-generation chipsets and FPGAs used in high-end TVs, set-top boxes, data storage systems, servers and other embedded systems.

Next-generation microprocessors and SoCs often use dynamic voltage scaling to reduce power dissipation and improve system performance. Implementing dynamic voltage scaling in a DC/DC converter often requires several external components. The AOZ2231CQI-01 and the AOZ2233CQI-02 simplify the design of such converters by allowing the system designer to control the output voltage from 0.6V to 1.79V using an I2C interface with 9.375mV steps.

According to Alpha and Omega Semiconductor, they have all the integration advantages of the EZBuck family, with the company’s MOSFET technology with advanced packaging technology. This is claimed to enable high-performance DC/DC regulators in a compact footprint. The MOSFETs enable high efficiency over the entire load range. Light load efficiency gets a further boost with an optional pulse frequency mode (PFM), adds the company. Both the 4.0A and the 8.0A devices are available in footprint-compatible QFN 4.0 x 4.0mm package for an easy upgrade path as power requirements increase.

The devices operate over a wide input voltage range of 6.5V to 28V and have a built-in 5.3V regulator making single supply operation possible. The proprietary COT architecture provides fast load transient response performance and allows stable and low voltage ripple operation with small size ceramic capacitors. It does not require external components when using all ceramic capacitors, nor do they need to generate a larger output ripple voltage to stabilise the circuit. Additionally, the input feed forward feature provides a constant switching frequency over the entire input voltage range, which alleviates noise concerns for designers.

The AOZ2231CQI-01 and the AOZ2233CQI-02 are immediately available in production quantities with a lead-time of 12 weeks.

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