Designers can optimise power and battery life for wearable medical/fitness and IoT applications, using the MAX14720 PMIC, says Maxim Integrated. It can be used for non-rechargeable battery (coin cell, dual alkaline) applications where size and energy efficiency are critical. An electronic battery seal also extends shelf life by effectively disconnecting the battery prior to initial power-up.
It also reduces bill of materials with the functionality of five discrete devices – power switch, linear regulator, buck regulator, buck-boost regulator, and monitor, says the company.

Running from a primary cell, it operates down to 1.8V, whereas most battery PMICs operate from 3V. The low quiescent current IP extends system runtime significantly, claims the company, a feature critical for wearable applications.
Other features for flexible operation and system diagnostics are pushbutton input monitoring, power-up sequencing, and voltage rail monitoring.
It is supplied in a 25-bump, 0.4mm pitch, 2.26 x 2.14mm wafer-level package and is specified over -40 to +85°C.

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