General Description
The RT9261B Series are VFM Step-up DC/DC converter ICs with ultra low supply current by CMOS process and suitable for use with battery-powered instruments.
The RT9261B IC consists of an oscillator, a VFM control circuit, a driver transistor (LX switch), a reference voltage unit, an error amplifier, resistors for voltage detection, and a LX switch protection circuit. A low ripple and high efficiency step-up DC/DC converter can be constructed with the RT9261B IC and only three external components.

FEATUREs
• Minimal Number of External Components (Only an Inductor, a Diode, and a Capacitor)
• Ultra Low Input Current (6.5µA at Switch Off)
• Capable of Supplying 50mA Output Current with Internal Switch
• ±2% Output Voltage Accuracy
• Low Ripple and Low Noise
• Low Start-up Voltage, 0.8V at 1mA
• 80% Efficiency with Low Cost Inductor
• +50 ppm/°C Low Temperature-Drift
• SOT-89 and SOT-25 Small Packages

APPLICATIONs
• Power source for battery-powered equipment
• Power source for cameras, camcorders, VCRs, PDAs, pagers, electronic data banks, and hand held communication equipment
• Power source for appliances, which require higher voltage than that of batteries used in the appliances