RM590 Step-Down DC/DC Module Nisshinbo RM590 Step-Down DC/DC Modules are synchronous, step-down DC/DC converters that deliver up to 400mA of output current. The RM590 can be configured for either PWM/VFM automatic shift operation or forced PWM operation by controlling of MODE pin. The Nisshinbo RM590 has a built-in inductor and is available in a 2.2mm x 2.0mm x 1.5mm sized QFN2220-8 package for high-density mounting. Therefore, it is possible to save space in the mounting area.