RN5RY401

VFM STEP-UP DC/DC CONVERTER CONTROLLER RN5RY××1 SERIES APPLICATION MANUAL NO.EA-030-0006 VFM STEP-UP DC/DC CONVERTER CONTROLLER RN5RY ××1 SERIES OUTLINE The RN5RY××1 Series are VFM Control ICs for step-up DC/DC converter with an external driver transistor featuring high output voltage accuracy and low supply current by CMOS process. Each of the RN5RY××1 Series ICs consists of a voltage reference unit, an error amplifier, an oscillator, a VFM control circuit and feed back resis- tors. A low ripple, high efficiency step-up DC/DC converter can be composed of the RN5RY××1 Series with only an inductor, a diode, a capacitor, and a drive transistor. Since the package for these ICs are SOT-23-5( Mini-mold)package, high density mounting of the ICs on boards is possible. FEATURES Low Supply Current ..................................................................................TYP. 3µA Low Standby Current ......................................................................