RT9261A Datasheet | Richtek

Description Features The RT9261 Series are VFM Step-up DC/DC ICs with ultra low supply current by CMOS process and suitable for use with battery-powered instruments. The RT9261 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 of this RT9261 IC with only three external ponents. The RT9261A IC provides with a drive pin (EXT) for an external transistor, so that a power transistor can be externally applied. Therefore, the RT9261A IC is remended for applications where large currents are required. EN pin enables circuit to set the standby supply current at a maximum of 0.5μA. Ordering Information RT9261/A- z Minimal Number of External ponents ( Only an Inductor, a Diode, and a Capacitor) z Ultra Low Input Current ( 5μA at Switch Off) z ±2% High Output Voltage Accuracy z Low Ripple and Low Noise z Low Start-up Voltage, 0.85V at 1m A z 75% Efficiency with Low Cost Inductor z +50 ppm/ °C Low Temperature-Drift z SOT-89 and SOT-23-5 Small Packages z Ro HS pliant and 100% Lead (Pb)-Free Applications z Power source for battery-powered equipment z Power source for cameras, camcorders, VCRs, PDAs, pagers, electronic data banks, and hand-held munication equipment z Power source for applications, which require higher voltage than that of batteries used in the appliances Package Type B : SOT-23-5 Pin Configurations X : SOT-89 Lead Plating System (TOP VIEW) P : Pb Free G : Green (Halogen Free and Pb Free) Output Voltage 15 : 1.5V 16 : 1.6V : 49 : 4.9V 50 : 5.0V Note : Use external switch Use internal switch Richtek products are : ` Ro HS pliant and patible with the current require- ments of IPC/JEDEC J-STD-020. ` Suitable for use in Sn Pb or Pb-free soldering processes. GND VOUT LX (TAB) RT9261 SOT-89 GND VOUT EXT...