Ultra-low Quiescent Current DC-DC Converter for Energy Harvesting
Ricoh Electronic Devices Co., Ltd. has launched the R1800 buck dc-dc converter with ultra-low quiescent current for energy harvesting. As the IoT market expands, the importance of technologies for harvesting ambient sources including light, vibration, and heat and converting them into electrical power is increasing in order to secure power supply for IoT devices.
The R1800 is a power-storing buck dc-dc converter for a photovoltaic or vibration energy harvester. It achieves a minimum starting power of 0.72μW while having an ultra-low quiescent current of 144nA (typical) at no load and normal temperature.
It also provides a high efficiency of 90% at a light load with 10µA output current.
The maximum power control, which maximally utilizes the harvester capability, optimizes a power supply from an energy harvester. The reverse current protection provides highly efficient power extraction with the lossless charge saved in the power storage element even if there is no power supply from the energy harvester.
The R1800 is offered in a small DFN(PLP)2730-12 package that enables high-density mounting.