OmniVision launches a new generation of ultra-low quiescent current high-efficiency synchronous buck converters WD1020/WD1021

     McKinsey predicts that by 2030, the Internet of Things will create an economic value of 5.5 trillion to 12.6 trillion US dollars in the world [1], and the number of Internet of Things connections in my country accounts for 30% of the world, and by 2025, it will exceed 8 billion [2] ]. In addition, the market size of wearable devices is also expanding rapidly. According to IDC, from 2020 to 2021, the global shipment of wearable devices exceeds 350 million units, and the domestic market size is expected to increase to 46.26 billion yuan by 2025 [3].

     The explosive growth of IoT applications and wearable devices is inseparable from the empowerment of power management technology. Small and portable battery-powered devices, such as Bluetooth headsets, smart watches, video doorbells, item trackers, etc., are often compact in size, have limited battery capacity, and are required to be able to stand by for a long time and respond quickly. The low power consumption performance of the system and the device itself puts forward high requirements. Battery life and "wake up" response time are related to the core performance of the device. Therefore, synchronous buck converters with ultra-low quiescent current and ultra-fast transient response are favored by designers.

     Committed to improving the performance of the Internet of Things and wearable devices, OmniVision Group, the world's leading developer of semiconductor solutions for advanced digital imaging, analog, touch and display technologies, recently released a new generation of high-efficiency synchronous buck converters WD1020/WD1021 .

     This series has an ultra-low 360nA quiescent current. High efficiency is still available at light loads as low as 10uA. Efficiency up to 97% over the full load range. Through the advanced peak current control architecture, the WD1020/WD1021 still has excellent dynamic response capability in a wide load range, which can effectively extend the battery life of battery-powered products, and is ideal for powering sensors, MCUs, wireless communications and other system components .

     By coding the 3 VSEL pins, the WD1020/WD1021 can achieve 8 different voltage outputs. When the input voltage is reduced to close to the output, it can automatically switch to 100% duty cycle mode operation, broaden the battery operating voltage range and enhance battery life; WD1020/WD1021 can also automatically switch to operate in PFM or PWM mode according to the size of the load ,

     In addition to ensuring battery life, designers need to balance high performance with small size and high efficiency. In terms of package and size, WD1020/WD1021 is packaged in CSP-8L, with an ultra-small size of 1.61mm×0.82mm. At the same time, the internal slope compensation is integrated, which reduces the number of peripheral devices. With a switching frequency of up to 1MHz, it can be used with small stickers. The combination of chip ceramic capacitors and inductors realizes a very compact overall solution, which provides a good fit for small-sized mobile applications such as smart watches, TWS earphones and smart bracelets, saving valuable internal space for product design.