Power

Converters are compact for power conversion in chipsets and FPGAs

4th May 2018
Caroline Hayes
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Two converters are the first in a family of I2C controllable EZBuck regulators, announced by Alpha and Omega Semiconductor. The 4.0A AOZ2231CQI-01 and the 8.0A AOZ2233CQI-02 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, says the company.

Next-generation microprocessors and SoCs often use dynamic voltage scaling to reduce power dissipation and improve system performance, explains the company. Implementing dynamic voltage scaling in a DC/DC converter typically requires several external components. The regulators make the design of such converters simple by allowing control of the output voltage from 0.6 to 1.79V using an I2C interface with 9.375mV steps.

They combine the company’s MOSFET technology with packaging technology for a compact (QFN 4.0 x 4.0mm) footprint for an upgrade path and enables high-performance DC/DC regulators that enable high efficiency over the entire load range, and light load efficiency with an optional pulse frequency mode (PFM). 

The devices operate over a wide input voltage range of 6.5 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 stable and low voltage ripple operation with small ceramic capacitors. According to the company, competing solutions require several external components when using all ceramic capacitors and need to generate a larger output ripple voltage to stabilise the circuit. The input feed forward feature provides a constant switching frequency over the entire input voltage range, to alleviate noise concerns.

The initial devices are immediately available in production quantities with a lead-time of 12 weeks.

 

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