Buck/boost regulator combines high efficiency and small size

Maxim Integrated Products, Inc. has launched the Continua MAX38889 2.5 V-to-5.5 V, 3 A reversible buck/boost regulator, designed for backup power applications using supercapacitor or other energy sources. Maxim claims the Continua family of backup regulators delivers the industry’s tightest output regulation of 2.5% to support 5-V applications and highest peak efficiency of 94%, which is 9% higher than the closest competitor.

The backup regulator solution also claims one-third the size of the closest competitive solution (218 mm2 vs. 606 mm2), targeting space-constrained applications. In addition to saving board space, it allows designers to reduce component count and bill-of-materials costs, said Maxim Integrated.

Buck/boost regulator combines high efficiency and small size

MAX38889 simplified application diagram (Image: Maxim Integrated Products)

 The MAX38889 supports a 2.5 V-to-5.5 V system output voltage range and a 0.5 V-to-5.5 V supercapacitor voltage range. After the supercapacitor is charged, the backup regulator draws only 4 µA of quiescent current. The operating temperature range is -40°C to 125°C.

In applications such as smart utility meters or automotive dashboard cameras, the MAX38889 Continua regulator operates in buck mode to charge a backup power source, such as a supercapacitor, said Maxim. When the main power is lost, the regulator reverses direction automatically, boosting the supercapacitor voltage to power the system, until main power is restored, added the company.

Buck/boost regulator combines high efficiency and small sizeThe MAX38889 regulates backup power for a variety of portable and non-portable applications, including retail price scanners and surveillance cameras, as well as home, building, automotive, industrial automation, and health-care IoT applications.

 The MAX38889 is priced at $2.36 (1000-up, FOB USA) on Maxim Integrated’s website and is available from authorized distributors. The MAX38889EVKIT# evaluation kit is priced at $63. EE-Sim models are available.


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