Richtek Technology Corporation : Products : RT9261B

Overview
Documents
Ordering Information

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-23-5 Small Packages
	RoHS Compliant and 100% Lead (Pb)-Free

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.
The EN pin enables the circuit to set the standby supply current at a maximum of 0.5μA.

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