Low dropout voltage regulator packs performance into small footprint

Trade-offs between quiescent current, output power, dynamic response, and package size are relieved, says STMicroelectronics at the launch of its STLQ020 low dropout (LDO) voltage regulator.

By combining small size with high performance and energy efficiency, the STLQ020 is particularly suitable for use in battery-powered consumer products like smartphones and tablets, smart watches, audio or media devices, and wearables. It helps extend battery life in IoT endpoints such as smart meters and wireless sensors, healthcare devices like wearable monitors, and industrial applications such as factory automation or sensor networking.

Drawing just 300nA quiescent current (Iq), and capable of supplying up to 200mA to the load, power-supply rejection (PSRR), and transient response, the STLQ020 is available in a choice of compact packages which can be as small as a 0.8 x 0.8mm flip-chip4.

The STLQ020’s dedicated low-power design and adaptive bias circuitry is claimed to ensure fast response and a stable output with high PSRR. In addition, dropout voltage as low as 160mV (typical) at maximum load allows longer equipment runtimes as the battery discharges. The 5nA logic-controlled shutdown mode allows the STLQ020 to extend the interval between coin-cell replacements in low-duty-cycle applications, like remote sensors.

With an input voltage range of 2.0 to 5.5V, the STLQ020 can be powered directly from a suitable battery voltage (VBAT) or logic rail. The output voltage can be set between 0.8 and 4.5V, with either fixed-output or adjustable-output versions available. The fixed output voltages are selectable in 50mV increments.

The STLQ020 is in production now, and available as a 2.0 x 2.0mm DFN6, 0.8 x 0.8mm flip-chip4, or 2.1 x 2.0mm SOT323-5L.

A quad-LDO evaluation board (STEVAL-LDO001V1) based on STLQ020 and three other low-dropout (LDO) voltage regulators are available to order.

http://www.st.com

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Ceva releases NeuPro AI processors 

Ceva will launch NeuPro artificial intelligence (AI) processors at CES 2018 (9 to 12 January). The family of processors is designed for deep learning inference at the edge.

The NeuPro family of processors is designed for smart and connected edge device vendors and builds on the company’s experience in deep neural networks for computer vision applications. Customers already deploy the Ceva-XM4 and Ceva-VA-XM6 vision platforms and CDNN, Ceva’s neural network software framework, in consumer, surveillance and ADAS products. This new family of dedicated AI processors offers a considerable step-up in performance, explains Ceva, ranging from two Tera operations per second (TOPS) for the entry-level processor to 12.5TOPS for the most advanced configuration.

The NeuPro processor line extends the use of AI beyond machine vision to new edge-based applications including natural language processing, real-time translation, authentication, workflow management, and many other learning-based applications that make devices smarter and reduce human involvement.

Ilan Yona, vice president and general manager of the Vision Business Unit at CEVA, commented: “It’s abundantly clear that AI applications are trending toward processing at the edge, rather than relying on services from the cloud. The computational power required along with the low power constraints for edge processing, calls for specialised processors rather than using CPUs, GPUs or DSPs. We designed the NeuPro processors to reduce the high barriers-to-entry into the AI space in terms of both architecture and software. Our customers now have an optimised and cost-effective standard AI platform that can be utilised for a multitude of AI-based workloads and applications.”

The NeuPro architecture combines hardware- and software-based engines. Optimisations for power, performance, and area (PPA) are achieved using a precise mix of hardware, software and configurable performance options for each application tier, says Ceva.

There are four AI processors in the NeuPro family, offering different levels of parallel processing. The NP500 is the smallest processor, and targets IoT, wearables and cameras. It has 512 MAC units. The NP1000 includes 1024 MAC units and targets mid-range smartphones, ADAS, industrial applications and AR/VR headsets. The NP2000 includes 2048 MAC units and targets high-end smartphones, surveillance, robots and drones. Finally, the NP4000 includes 4096 MAC units for high-performance edge processing in enterprise surveillance and autonomous driving.

Each processor consists of the NeuPro engine and the NeuPro VPU. The NeuPro engine includes the hardwired implementation of neural network layers which include convolutional, fully-connected, pooling, and activation.

The NeuPro VPU is a cost-efficient programmable vector DSP, which handles the CDNN software and provides software-based support for advances in AI workloads. NeuPro supports both eight- and 16-bit neural networks. The MAC units achieve better than 90 per cent utilisation when running, ensuring highly optimised neural network performance. The overall processor design reduces DDR bandwidth substantially, improving power consumption levels for any AI application, adds Ceva.

The NeuPro family, coupled with CDNN, provides deep learning for developers to easily and efficiently generate and port their proprietary neural networks to the processor. CDNN supports the full gamut of layer types and network topologies, enabling fastest time-to-market, assures Ceva.

In conjunction with the NeuPro processor line, Ceva will also offer the NeuPro hardware engine as a convolutional neural network (CNN) accelerator. When combined with the CEVA-XM4 or CEVA-XM6 vision platforms, this provides a flexible option for customers looking for a single, unified platform for imaging, computer vision and neural network workloads.

NeuPro will be available for licensing to select customers in Q2 2018 and for general licensing in Q3 2018.

 

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