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CHARGE_PUMP_BOOST_CONVERTER

2015-03-20 08:07  
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CHARGE_PUMP_BOOST_CONVERTER
The circuit overcomes the charge pump's lack of regulation by adding a regulator externally. Another option-if load currents are modest-is to add regulation on the chip. Regulation in a monolithic chip is generally accomplished either as linear regulation or as charge-pump modulation. Linear regulation offers lower output noise; therefore, provides better performance in (for example) a GaAsFET-bias circuit for RF amplifiers. Charge-pump modulation (which controls the switch resistance) offers more output current for a given die size (or cost) because the IC need not include a series pass transistor.