Smallest regulator for supercapacitor backup

June 01, 2021 // By Nick Flaherty
Smallest regulator for supercapacitor backup
Maxim’s MAX38889 has efficiency of 94 percent and 2.5 percent output accuracy for supercapacitor backup in industrial, asset tracking, automotive and healthcare designs

Maxim Integrated has launched a buck/boost regulator for supercapacitor backup designs that provides 94 percent efficiency.

The Continua MAX38889 2.5V-to-5.5V, 3A reversible buck/boost regulator with output regulation of 2.5 percent to support critical applications that demand high accuracy.

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. When main power goes away, the regulator reverses direction automatically, boosting the supercapacitor voltage to power the system, until main power is restored

The MAX38889 design, without supercapacitor, has a footprint of 218mm², allowing designers to reduce component count, cut board space and save BOM cost. Smaller size also makes it easier to integrate into new and existing designs with tight space constraints. The MAX38889 regulates backup power for a wide range of both portable and non-portable applications, such as retail price scanners and surveillance cameras, and others used in home, building, automotive, industrial automation and healthcare IoT.

“Maxim’s Continua family of backup voltage regulators uses advanced switching regulator design to deliver bi-directional buck/boost featuring tight output regulation that minimizes space while increasing power efficiency,” said Anil Telikepalli, managing director of the Core Products Group at Maxim Integrated. “This is the third product from our Continua line as Maxim strives to enable always-on applications by solving the design engineer’s toughest backup power challenges.”

The MAX38889 is available for $2.36 (1000-up, FOB USA). The MAX38889EVKIT# evaluation kit is available for $63.

EE-Sim models are available at maxim.click/EE_Sim_Maxim

maxim.click/MAX38889_Product

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