RN5RYXX1 Datasheet, PDF (1/12 Pages) RICOH electronics devices division – VFM STEP-UP DC/DC CONVERTER CONTROLLER

VFM STEP-UP DC/DC
CONVERTER CONTROLLER
RN5RYxx1 SERIES
NO. EA-030-0204
OUTLINE
The RN5RYxx1 Series are CMOS-based VFM Control ICs for step-up DC/DC converter with an external dri-
ver transistor featuring high output voltage accuracy and low supply current. Each of the RN5RYxx1 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 RN5RYxx1 Series with only an
inductor, a diode, a capacitor, and a drive transistor.
Since the package for these ICs is 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 ^{..................................................................................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.
BLOCK DIAGRAM
CE
5
EXT
3
OSC
Output
Buffer
VOUT
2
Vref
GND
1
1