RP514 Switching Voltage Regulators Nisshinbo RP514 Switching Voltage Regulators are DC/DC buck converters with a battery monitor with ultra-low current and low voltage resistance. The battery monitor divides the input voltage (VIN) into 1/3 or 1/4 and provides the microcontroller's built-in low voltage ADC with buffered voltage without external circuits. Features include reduced space and components and high efficiency. These Nisshinbo switching regulators operate from 1.8V to 5.5V input voltage range. Applications include coin cell-used equipment and Li-ion battery-used equipment, wearable devices, low-power RF modules, low-power CPUs, memory, sensor devices, and an energy harvester.