Highly Efficienct Power Management IC For Google Coral AI Products

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ISL91301B PMIC delivers up to 16A and 94 percent peak efficiency in 70mm2 solution size

Renesas Electronics Corporation, a premier supplier of advanced semiconductor solutions, has announced its ISL91301B Power Management IC (PMIC) is designed into the latest Google Coral products. They include the Mini PCIe Accelerator, M.2 Accelerator A+E Key, M.2 Accelerator B+M Key and System-on-Module (SoM). Google Coral integrates seamlessly into processes at any scale, helping designers create a variety of local artificial intelligence (AI) solutions for several industries.

Google Coral technology enables advanced neural network processing for low-power devices. At the heart of Coral is the Google Edge Tensor Processing Unit (TPU) coprocessor, which is capable of performing four trillion operations per second (TOPS), using 0.5 watts for each TOPS (2 TOPS per watt). For example, it can execute advanced mobile vision models, such as MobileNet v2 at 400 FPS, in a power efficient manner.

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The Renesas ISL91301B PMIC offers a high efficiency and small footprint power solution that is ideal for cutting-edge, low power edge AI processors. The ISL91301B has quad buck regulator outputs, each delivering up to 4A (total 16A) with 94 percent peak efficiency. The PMIC leverages Renesas’ R5 Modulation Technology for quick single-cycle transient response, tuned compensation, and fast switching frequency. These features and a 70mm2 solution size make it easier for power supply designers to design a small AI solution with 2mm x 2mm x 1mm low profile inductors, small capacitors, and a few passive components. The ISL91301B’s low quiescent current, superior light load efficiency, high DC accuracy and fast dynamics is well suited for low-power or battery-powered AI products.

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“We are thrilled to be collaborating with Google on their innovative, next generation products,” said Andrew Cowell, Vice President, Mobility Infrastructure & IoT Power Business Division at Renesas. “Our multiphase PMIC employs Renesas’ industry-leading R5 modulation technology for blazingly fast transient response, which allows Google’s designers to dynamically scale power to improve overall system performance.”

Kai Yick, Google Hardware Manager said, “Renesas’ Multiphase PMICs provide our engineering team with the high performance and design flexibility required to build Coral. Our collaboration with Renesas ensures our Edge TPU achieve the highest power efficiency to perform calculations offline and locally.”

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