Renesas Electronics Launches Buck-Boost DC/DC Converter with Ultra-Low Quiescent Current Ideal for Powering Sensors, MCUs, Wireless Devices, and Other Components
Renesas Electronics Corporation (TSE: 6723), a global supplier of semiconductor solutions, announced the launch of the ISL9122A, a flexible buck-boost switching regulator with bypass mode that provides ultra-low quiescent current (IQ) and is suitable for powering sensors, microcontrollers (MCUs), wireless devices, and other system components. The ISL9122A supports 1.8V to 5.5V battery power and can extend the battery life of smart IoT devices powered by button cells, lithium batteries, and multi-series alkaline battery packs. Target applications include wireless headphones, fitness equipment, smart watches, water and gas meters, portable medical devices, and a variety of battery-powered smart IoT devices.
The ISL9122A buck-boost switching regulator has an I2C interface and a programmable 25mV step to achieve dynamic voltage scaling (DVS) to optimize system power consumption. The regulator has a maximum output voltage of 5.375V, which maximizes the performance of IoT devices with RF functions over the entire battery voltage range. Its PFM and PWM functions maximize efficiency over the entire output current range. In forced PWM mode, the regulator always maintains a switching frequency of 2.5MHz to improve system EMI performance.
“As IoT wireless connectivity explodes, the ISL9122A buck-boost regulator’s fast response from no load to full load makes it ideal for powering the next generation of devices,” said Andrew Cowell, Vice President of the Mobile, Infrastructure and IoT Power Business Unit at Renesas Electronics. “Our customers are very pleased with the ISL9122A’s flexibility, dynamic voltage scaling, and industry-leading quiescent power consumption.”
Both the ISL9122A buck-boost regulator and the recently released ISL9123 step-down regulator are ultra-low IQ switching regulators that can power Renesas’ RL78 family of 8/16-bit ultra-low-power MCUs, the RA family of 32-bit MCUs based on Arm ® Cortex ® -M cores, and the RE family of embedded controllers for wearable devices and energy harvesting applications.
Key Features of the ISL9122A Buck-Boost Regulator with Bypass Mode
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Ultra-low IQ <1.3 μA and low 7nA shutdown current extend battery life
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High efficiency (84%@10μA) at light load, with peak efficiency of 97% to reduce power consumption and temperature rise
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Automatic and selectable pass-through modes reduce IQ
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Wide 1.8V to 5.5V input voltage range for a variety of battery-powered applications
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Adjustable output voltage range from 1.8V to 5.375V in 25mV steps
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The maximum output current can reach 500mA (V out =3.3V, V in =3.6V)
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Ultra-small 1.8mm x 1.0mm WLCSP or 3mm x 2mm DFN packages save board space
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Only three external components required: inductor, input capacitor, and output capacitor
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Comprehensive over-current, short-circuit and over-temperature protection
The ISL9122A is available now from Renesas Electronics’ worldwide distributors, priced at $0.89 each (8-pin DFN package) and $0.78 each (8-bump WLCSP package) in 1,000-unit quantities. For more information, visit
https://www.renesas.com/products/ISL9122A。
Renesas also offers two ISL9122A evaluation boards for designers to evaluate the product’s features and performance: the ISL9122AIRN-EVZ with 3.3V default output (DFN) and the ISL9122AIIN-EVZ with 3.3V default output (WLCSP), both priced at $70.
Note: All product or service names mentioned in this press release are trademarks or registered trademarks of their respective owners.
Renesas Electronics Corporation (TSE: 6723) provides professional and trusted innovative embedded design and complete semiconductor solutions to improve the work and lifestyle of people through billions of connected intelligent devices using its products. As a global leading supplier of microcontrollers, analog power devices and SoC products, Renesas Electronics provides comprehensive solutions for various applications such as automotive, industrial, infrastructure and IoT, and looks forward to working with you to create an infinite future. For more information, please visit renesas.com.
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