MC33463 Datasheet | Motorola Semiconductor

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 parator 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 puter, 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 m A 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 Ground Output EXT 1 2 3 (Top View) Tab (Tab is connected to Pin 2) Tab (Tab is connected to Pin 2) H SUFFIX PLASTIC PACKAGE CASE 1213 (SOT- 89) ORDERING INFORMATION Device MC33463H- 30KT1 MC33463H- 33KT1 MC33463H- 50KT1 MC33463H- 30LT1 MC33463H- 33LT1 MC33463H- 50LT1 Output Voltage 3.0 3.3 5.0 3.0 3.3 5.0 Type Int. Switch S it h Ext. S it h Switch Di Drive Operating Temperature Range Other voltages from 2.5 V to 7.5 V, in 0.1 V increments are available. Consult factory for information. © Motorola, Inc. 1999 Rev 1 MOTOROLA ANALOG IC DEVICE DATA .. Representative Block Diagrams MC33463H- XXKT1 D L Vin Cin Drive 3 Lx VLx Limitier 2 Output CO VO VFM Controller 100 k Hz Oscillator Vref 1 Gnd L Vin Cin MC33463H- XXLT1 D 2 Rb Q 3 EXT Cb VFM Controller Drive Output CO VO 100 k Hz Oscillator Vref 1 XX Denotes Output Voltage Gnd This device contains 100 active transistors. ÁÁÁÁÁÁÁÁ...