MC33466 1.5V升压电路.pdf

The MC33466 series are micropower 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 MARKING low quiescent bias current of 15 µA typical. DIAGRAM The MC33466H–XXJT1 series features a highly accurate voltage reference, an oscillator, a pulse width modulation (PWM) controller, a TAB SOT–89 xxy driver transistor (Lx), an error amplifier and feedback resistive H SUFFIX divider. 1 CASE 1213 The MC33466H–XXLT1 is identical to the MC33466H–XXJT1, yzz except that a drive pin (EXT) for an external transistor is provided. Due to the low bias current specifications, these devices are ideally xx = Voltage Option (30, 33, 50) suited for battery powered computer, consumer, and industrial yy = 1A = JT1, 2B= LT1 zz = Lot Code equipment where an extension of useful battery life is desirable. MC33466 Series Features: • Low Quiescent Bias Current of 15 µA PIN CONNECTIONS • High Output Voltage Accuracy of ±2.5% MC33466H–XXJT1 • Low Startup Voltage of 0.9 V at 1.0 mA • Soft–Start = 500 µs • Surface Mount Package