AKM DC-DC boosts voltages for energy harvesting
New DC-DC step-up converter is capable of boosting voltage from 15 millivolts
Asahi Kasei Microdevices (AKM) has launched a new DC-DC step-up converter with ultra-low power consumption that is able to boost low voltages, offering solutions for remote and battery-free operation as well as low-maintenance applications in the fields of asset monitoring and IoT.
The AP4473 can boost an input voltage of as low as 15 millivolts (mV) while maintaining an ultra-low power consumption of only 26 nanoamperes (nA). This single-chip solution allows electricity generation from a minimal thermal energy source, such as body heat, while enabling overcharge prevention and power supply control with minimal energy consumption.
In addition to the boost circuit, the device incorporates a PMOS switch and two hysteresis comparators. The switch disconnects the energy storage devices, such as capacitors, from the system, while its comparators automatically start and stop supplying power to the system. This makes it possible to configure a power supply unit in an energy harvesting system with a minimal number of passive elements, contributing to size and cost reductions for the overall system.
The AP4473 is suitable for applications in beacons for asset tracking and asset monitoring, environmental monitoring and IoT sensor nodes, as well as smartcards or IoT devices.