MC33463

( DataSheet : www.DataSheet4U.com ) Order this document by MC33463/D MC33463 Variable Frequency Micropower DC-to-DC Converter The MC33463 series are micropower step–up switching voltage regulators, specifically designed for handheld and laptop applications, to provide regulated output voltages using a minimum of external parts. A wide choice of output voltages are available. These devices feature a very low quiescent bias current of 4.0 µA typical. The MC33463H–XXKT1 series features a highly accurate voltage reference, an oscillator, a variable frequency modulation (VFM) controller, a driver transistor (Lx), a comparator and feedback resistive divider. The MC33463H–XXLT1 is identical to the MC33463H–XXKT1, except that a drive pin (EXT) for an external transistor is provided. Due to the low bias current specifications, these devices are ideally suited for battery powered computer, consumer, and industrial equipment where an extension of useful battery life is desirable. VARIABLE FREQUENCY MICROPOWER DC–to–DC CONVERTER SEMICONDUCTOR TECHNICAL DATA TAB 1 MC33463 Series Features: Low Quiescent Bias Current of 4.0 µA High Output Voltage Accuracy of ±2.5% Low Startup Voltage of 0.9 V at 1.0 mA Wide Output Voltage Range of 2.5 V to 7.5 V Available High Efficiency of 80% Typical Surface Mount Package PIN CONNECTIONS MC33463H–XXKT1 Ground Output Lx 1 2 3 (Top View) Package (Tape/Reel) SOT–89 (T (Tape) ) 30° to +80 80°C TA = –30 SOT–89 (T (Tape) ) MC33463H–XXLT1 Grou...