The power management integrated circuit (PMIC) MAX14720 from Maxim Integrated helps designers to optimize power and battery life for wearable medical/fitness and Internet of Things (IoT) applications. The chip is ideal for non-rechargeable battery (coin cell, dual alkaline) applications where size and energy efficiency are critical.
By integrating the functionality of five discrete devices (power switch, linear regulator, buck regulator, buck-boost regulator, and monitor), the MAX14720 reduces the bill of materials (BOM) and form factors of designs.
“In 2020, 190 million wearable electronic devices for fitness and health will be sold, generating US$ 14.4 billion in revenue,” according to Gartner. Angela McIntyre, Research Director and Michele Reitz, Principal Research Analyst at Gartner said, “System design for wearables will remain fairly straightforward, employing basic microcontroller unit (MCU)-based processing, BT and Wi-Fi communications, and accelerometer and gyro sensor chips, with display drivers, optoelectronics, USB charging interfaces, small NOR memory and power regulator chips playing major roles in many wearable designs.”
While most battery PMICs operate from 3V, the MAX14720 runs from a primary cell and operates down to 1.8V, thereby saving power. The low quiescent current of the device is critical for wearable applications because it can extend the runtime of the system significantly.
Further, the device achieves longer product shelf life by using an electronic battery seal which also allows for a fully sealed housing. Value added features such as push button input monitoring, power-up sequencing, and voltage rail monitoring further reduce BOM cost and space, and help in flexible operation.
Specified over the -40 degree celsius to +85 degree celsius temperature range, the device is available in a 25-bump, 0.4mm pitch, 2.26mm x 2.14mm wafer-level package (WLP).