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Optical Measurements Sensitivity Reaches New Height With Maxim’s Ultra-Low-Power PMIC

Submitted By: 

Shreepanjali Mod

MAX20345 is the new power-management IC (PMIC) by Maxim Integrated Inc. will now extend battery runtime of Internet of Things devices and always-on wearables while narrowing down form factor. A highly integrated and tiny device, this PMIC packs-in a lithium charger. It also features one-of-its-kind architecture that balances optical measurements sensitivity for all kind of IoT based devices. It truly resolves the biggest issue with health and fitness applications.

Fig. 1: Image Showing MAX20345 Supporting IoT Devices

Precision of optical sensing wearable devices often gets compromised by myriad of biological factors. This has posed some hard challenge for designers who have been working to modify this drawback and specifically improve the SNT (Signal-to-Noise ratio).

The earlier generations of low-quiescent-current regulators favored wearable application that constrict the SNR like low-frequency, high amplitude ripple and longer setting times over wrist. There are some who also picked up high-quiescent-current options to get over these flaws, however, they needed to address problems like power consumption that shortens battery life and demands bigger size battery.


The MAX20345 is one of the first PMICs to feature a buck-boost regulator that works in sync with its unique framework optimized for precise blood-oxygen, heart rate, blood pressure and other sensitive optical measurements. This regulator is capable of yielding low-quiescent-current performance without the factors that pull back the SNR. This will pull up the performance by 7dB.

You can count on it for much superior performance, smaller footprint and better battery life for sure. Its sophisticated architecture for IoT designs and space constrained wearables will definitely give a better experience to users.


The MAX20345 gets an edge over all others in its domain for being an ultra-low-power PMICs for small sized IoT and small devices. These small gadgets will play a vital role in pulling up the device efficiency without compromising battery runtime.