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 resistors. 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.

FEATURES

• Low Supply Current ..................................................................................TYP. 3µA

• Low Standby Current..................................................................................TYP. 0.6µA

• Low Temperature-Drift Coefficient of Output Voltage ...........................TYP. ±50ppm / ˚C

• High Accuracy Output Voltage...................................................................±2.5

• Low Oscillation Start-up Voltage...............................................................MAX. 0.8V

• Small Package ............................................................................................. SOT-23-5(Mini-Mold)

APPLICATIONS

• Power source for battery-powered instruments.

• Power source for cameras, VCRs, camcorders, pagers, and other hand-held communication instruments.