SAN JOSE, Calif., Jan. 9, 2019 /PRNewswire/ -- Designers of
always-on wearable and internet of things (IoT) devices now have an
easier way to extend battery runtime while shrinking form factor
with the latest tiny, highly integrated power-management IC (PMIC)
from Maxim Integrated Products, Inc. (NASDAQ: MXIM). The
ultra-low-power MAX20345 integrates a lithium charger and
debuts a unique architecture that optimizes the sensitivity of
optical measurements for wearable fitness and health
applications.
- Details about MAX20345:
www.maximintegrated.com/products/MAX20345
- Hi-res image: http://bit.ly/MAX20345_Image
In wearables, optical-sensing accuracy is impacted by a variety
of biological factors unique to the user. Designers have been
striving to increase the sensitivity of optical systems, in
particular the signal-to-noise ratio (SNR), to cover a broader
spectrum of use cases. Traditional low-quiescent-current regulators
favored in wearable applications come with tradeoffs that degrade
SNR on the wrist, such as high-amplitude ripple, low-frequency
ripple and long-settling times. Some designers have even turned to
high-quiescent-current alternatives to overcome these drawbacks,
but they must deal with increased power consumption, which reduces
battery runtime or requires a larger battery. The MAX20345 features
a first-of-its-kind buck-boost regulator based on an innovative
architecture that's optimized for highly accurate heart-rate,
blood-oxygen (SpO2) and other optical measurements. The regulator
delivers the desired low-quiescent-current performance without the
drawbacks that degrade SNR and, as a result, can increase
performance by up to 7dB (depending on measurement conditions).
The MAX20345 is also the latest in a line of ultra-low-power
PMICs for small wearables and IoT devices that help raise
efficiency without sacrificing battery runtime. To meet these
needs, the MAX20345 integrates a lithium-ion battery charger; six
voltage regulators, each with ultra-low quiescent current; three
nanoPower bucks (900nA typical) and three LDO regulators with
ultra-low quiescent current (as low as 550nA typical). Two
load switches allow disconnecting of system peripherals to minimize
battery drain. Both the buck-boost and the bucks support dynamic
voltage scaling (DVS), providing additional power-saving
opportunities when lower voltages can be deployed under favorable
conditions. The MAX20345 is available in a 56-bump, 0.4mm pitch,
3.37mm x 3.05mm wafer-level package (WLP).
Key Advantages
- Superior Performance for Optical Systems: the integrated
buck-boost regulator provides the low ripple at high frequency that
will not interfere with optical measurements. These short settling
times support the high-sensitivity optical-sensor measurements on
wearables.
- Extended Battery Life: regulators with nanoPower
quiescent current reduce sleep and standby power, which in
turn extends battery runtime and allows for smaller battery size.
High-efficiency regulators preserve battery energy during active
states.
- Small Footprint: by eliminating multiple discrete
components, the MAX20345 provides a sophisticated power
architecture for space-constrained wearable and IoT designs.
Commentary
- "With sales of fitness and wellness wearable electronics
expected to rise to over 114 million units by 2020, there is
increasing demand for better, more precise sensing technology for
measuring health vitals including heart rate and blood-oxygen
levels," said Kevin Anderson, senior
analyst for power semiconductors at IHS Markit.
- "Maxim is continuing to deliver precedent-setting innovations
in the wearable healthcare arena. Our new MAX20345 extends our
portfolio of ultra-low-power PMICs for wearable and always-on
applications, bringing to the market a solution that enables the
highest sensitivity optical sensing in wrist-worn form factors for
more accurate vital-sign measurements," said Frank Dowling, director of business management,
Industrial & Healthcare Business Unit, at Maxim
Integrated.
Availability and Pricing
- The MAX20345 is available at Maxim's website for $4.45 (1000-up, FOB USA) and is also available from authorized
distributors
- The MAX20345EVKIT# evaluation kit is available
for $57.00
About Maxim Integrated
Maxim Integrated develops
innovative analog and mixed-signal products and technologies to
make systems smaller and smarter, with enhanced security and
increased energy efficiency. We are empowering design innovation
for our automotive, industrial, healthcare, mobile consumer and
cloud data center customers to deliver industry-leading solutions
that help change the world. Learn more at
https://www.maximintegrated.com.
Contact:
|
Mariel
Santos
|
|
408-601-3145
|
|
mariel.santos@maximintegrated.com
|
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SOURCE Maxim Integrated Products, Inc.