100mA LDO regulator draws only 0.2µA

March 09, 2017 // By Julien Happich
The RP118 from Ricoh Europe is a 100mA, ultra-low consumption LDO (low-dropout) regulator delivered in a 0.64x0.64x0.36mm WLCSP-4-P8 package.

With a current consumption of just 0.2µA at no-load and a standby current of 000.2µA, the chip suits those applications that are mainly in sleep mode and resume for a periodical brief moment to perform a task. The ultra-low current consumption of the RP118 extends the battery lifetime of wireless devices with RF transmitters (BLE, Zigbee, WiSun, Ant), low power CPUs, sensors and energy harvesting circuits.

Operating in three different modes, the RP118 switches automatically between a low power consumption mode and a fast transient response mode, based on the output current demand of the application. The off mode can be achieved by controlling the Chip Enable pin. The performance of the LDO is enhanced in fast transient response mode. In particular, the ripple rejection as well as the response speed to line and load transients demonstrate better results than a conventional low current consumption LDO.  The RP118 features an embedded fold back current limit circuit. When a short circuit occurs, this circuit contributes to the decrease of the output current to the level of 50mA, thus protecting the LDO and other electronic parts from possible damage. Optional is an auto-discharge function that enables a fast discharge of the output capacitor when the LDO switches off. The RP118 also comes in standard SOT23-5 and small DFN (PLP) 1010-4 packages.

Visit Ricoh Europe at www.e-devices.ricoh.co.jp