Ricoh R1800K Series DC/DC Converters are power-storing buck DC/DC converters for photovoltaic and vibration energy harvesters. A low operating quiescent current allows a harvester to be used under a low-illumination environment. The R1800K Series is suitable for equipment with low power supplied from a harvester.
Features
Provides low operationg quiescent current (l
Q 144nA) and a high efficiency (approximately 90% @ 10μA)Control function optimizes a power supply from an energy harvester
Specifications
2.0V to 5.5V input voltage range2.0V to 4.5V output voltage range±3.0% output voltage accuracyTyp. 144nA (Ta = 25°C, at no load) operating quiescent current720nW starting powerReverse current protection (V
IN ≥ 2.0V
) 200mV accuracy of maximum power voltage
Applications
Energy harvesting module of a photovoltaic and vibration energy harvester
