Power management chip cuts inductor size by ten
“Inductor size and value has been a big limiting factor in power supplies, limiting power supply speed and form factor. Even in mobile devices, many power supplies are now being implemented with more expensive multi-phase power supplies each requiring multiple large inductors,”said Sridhar Kotikalapoodi, Founder and Chief Executive Officer of SiBreeze.
The Si117 uses the company’s proprietary SLIM SWITCHER and BEST SWITCHER technologies to reduce the inductor values by ten compared to other designs running at the same frequency. It allows four times the phase response, efficiency and noise with a single inductor, allowing multiple independent CPU voltage rails and a lower bill of materials. The chip also provides five times the bandwidth at same switching frequency, giving dynamic Power-on-Demand for increased battery life. The single inductor approach also provides higher power fast charging capability in a smaller form factor.
The chip has a 2.5V to 14V input with a 24V holdoff, but the company is not giving the actual figures for the inductor values or the frequency response. This will be updated when the data is available.
“With the release of our Si117 product, one can validate our ground breaking SLIM SWITCHER and BEST SWITCHER technologies,” said Kotikalapoodi. “Our technologies are beneficial to a wide range of applications ranging from reducing energy wastage in Data Centres to enabling slimmer form factor devices with increased battery run time in mobile and Internet of Things (IoT) applications,” he said. “Some high end applications in networking, Point of Load converters use expensive complex control algorithms providing incremental speed benefits.”
The company is now working on a power supply controller for mobile CPUs, called the Si347.
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