Campbell, CA, February 14, 2018 – Ricoh Electronic Devices Co., Ltd. has launched the R1800 Buck DC/DC Converter, designed for use in energy harvesting devices, which are able to collect and store energy obtained from sources such as solar or vibration energy. Target applications include wearables for sports and healthcare, wireless sensors and IoT devices.
This is a DC/DC converter collecting energy generated from a photovoltaic or vibration energy harvester cell and stores it in a super capacitor or rechargeable battery. An ultra-low quiescent current of 144 nA even allows to use the harvester circuit in a low-illumination environment and when the generated level of energy is moderate. The R1800 enables the development of batteryless applications, which neither need battery replacement maintenance nor need power from another source to recharge. Instead, the application will operate as long there is sufficient light or vibration available.
As soon as there is sufficient energy available on the input side, the buck DC/DC Converter will be enabled to transfer energy from input to output. During this phase the transferred energy is stored in a super capacitor or battery on the output until the energy left on the input drops below a threshold. The DC/DC Converter is disabled and new energy will be collected on the input. This process repeats and increases the energy level in the capacitor or battery until the required output voltage is reached.
A reverse current protection circuit prevents current to flow from output to input as soon the energy harvesting cell does not provide energy. The circuit is triggered when the input voltage drops below the output voltage.
The R1800 is available in a DFN(PLP)2730-12 package.
R1800 Features:
Input Voltage Range
Output Voltage Range Output Voltage Accuracy Output Current Quiescent Current Protection Circuits Peak Efficiency Package R1800K |
2.0 V to 5.5 V 2.0 V to 4.5 V ±3.0% 2 mA (at no load) Typ. 144 nA Reverse Current 92% DFN(PLP)2730-12 |
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© 2018 Ricoh Electronic Devices Co., Ltd. All rights reserved. All referenced product names are
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Contact:
Alan T. Sue
Director, Marketing & Sales
Electronic Devices Division
RICOH AMERICAS HOLDINGS, INC.
Tel: (408) 610-3105
Email: alan.sue@ricoh-usa.com