Maxim Integrated has introduced the MAX17710, an IC integrating all of the power management functions for ambient energy harvesting, as well as for charging and protecting micro-energy cells (MECs), a form of solid-state battery.
Operating at an ultra-low current level, the chip accepts energy from a variety of poorly regulated energy harvesting sources with output levels ranging from 1 μW to 100 mW. Examples include light (captured by photovoltaic cells), vibration (captured by a piezoelectric element), heat (captured by a thermoelectric generator), and RF (e.g., near-field communications (NFC)).
The MAX17710 integrates a programmable input boost regulator and needs no expensive external components to charge an MEC with energy sources as low as 0,8 V. It protects the MEC by using a linear shunt-series regulator. An ultra-low quiescent current, adjustable low-dropout linear regulator (LDO) with selectable voltages of 3,3 V, 2,3 V or 1,8 V allows the device to adapt to a variety of loads.
Packaged in a low-profile 0,5 mm TQFN, the IC enables thin, card-like applications, and will also be available in wafer form to enable even thinner form factors.
The device is targeted at powered smart cards, real-time clock (RTC)/memory backup applications and wireless sensor networks. Examples of wireless sensor networks include remote applications like irrigation valve control, building energy management, machine monitoring systems, asset tracking, biometric security systems, medical applications and a myriad of portable consumer electronics.
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