New Buck-Boost DC-DC Eval Board for Ultra-Compact Mounting

Willich-Münchheide, Germany, July 22, 2026 – ROHM has developed a new evaluation board, the BD83070GWL-EVK-002. It is designed to fully demonstrate the features of the BD83070GWL DC-DC converter IC, which combines high efficiency with ultra-low current consumption. (Fig. 1) In recent years, battery-powered electronic devices-such as wearables, mobile devices, and IoT devices have become ubiquitous in everyday life. The components used in these devices require not only miniaturization to improve design aesthetics and enable new features, but also to reduce power consumption in order to extend battery life. ROHM has continued to develop power supply ICs to meet these market demands. The BD83070GWL is a buck-boost DC-DC converter IC developed with the goal of becoming a “definitive low-power eco-device” for electronic devices powered by small batteries and other limited power sources. It achieves high efficiency of up to 97% and an ultra-low quiescent current of 2.8 µA. The newly developed evaluation board was designed to achieve the smallest possible footprint for a buck-boost DC-DC converter, a key requirement for small battery-powered devices. By integrating the BD83070GWL with a coil, capacitors, and a total of only five components, it achieves an ultra-compact mounting area of 12.87 mm2 (3.3 × 3.9 mm). As a result, it offers a significant advantage in terms of mounting area compared to conventional buck-boost DC-DC IC configurations, including those with built-in coils. Furthermore, as a reference design, design resources such as circuit patterns and the bill of materials (BOM) are publicly available, enabling a smooth transition from evaluation to mass production design. The new evaluation board is now available. Online sales have also started, and it is available for purchase through online distributors such as DigiKey and Farnell. Application Examples • Wearable devices: smartwatches, smart rings, biometric sensing devices, etc. • Mobile devices: AR/VR devices, smartphones, etc. • IoT devices: AI sensor nodes, BLE devices, smart locks, small drones, etc. • Small battery-powered devices: e-cigarettes, wireless earbuds, digital keys, electric toothbrushes, etc. Visit ROHM’s Website for More Information • Related News: New Buck-Boost DC-DC Converter Achieves Breakthrough Power Savings • Video: Buck-Boost DC-DC BD83070GWL

About ROHM Semiconductor ROHM, a leading semiconductor and electronic component manufacturer, was established in 1958. From the automotive and industrial equipment markets to the consumer and communication sectors, ROHM supplies ICs, discretes, and electronic components featuring superior quality and reliability through a global sales and development network. ROHM’s strengths in the analog and power markets allow us to propose optimized solutions for entire systems that combine peripheral components (i.e. transistors, diodes, resistors) with the latest SiC power devices as well as drive ICs that maximize their performance. Please visit ROHM’s website for more information: https://www.rohm.com